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La pandemia por el Covid-19 y los últimos eventos políticos fortalecieron al bitcoin y al oro como los principales activos para el resguardo de capitales.
Según datos de Tradingview, en los últimos 6 meses el oro incrementó su precio un 20%, mientras que el bitcoin, a pesar de haber mostrado un comportamiento más volátil, aumentó un 25%.
Al momento de esta redacción el oro cotizó en $1973 por onza, y el bitcoin en $11.134 con una capitalización de $205.002.138.787.
Ambos activos son utilizados como reserva de valor a largo plazo, pero la criptomoneda tiene ventaja como método de pago por su forma digital.
Además, el BTC tiene un suministro máximo de 21 millones de unidades mientras que para el oro no se tiene muy claro cuánto queda por extraer. Los dos son escasos, pero la oferta limitada del bitcoin podría ser más atractiva para la demanda.
Binance, la mayor exchange del mundo, publicó el siguiente análisis en el que compara los aspectos más importantes del bitcoin y el oro como activos:
La resistencia falsificadaEs un término que mide la calidad de la unicidad de un activo específico. Los activos propensos a la falsificación conllevan un alto riesgo de devaluación y, a menudo, requieren métodos o herramientas de detección de falsificaciones. Es muy difícil verificar la calidad y pureza del oro, o si es oro, sin las herramientas adecuadas.
El oro físico es propenso a la falsificación y a la reducción de su pureza, mientras que el bitcoin es totalmente resistente a la falsificación. Esto es posible gracias a la red blockchain, que verifica y registra cada moneda y transacción extraída.
La portabilidadEs un rasgo importante que te permite transferir sus activos sin problemas en poco tiempo. Ya sea que poseas oro físico o un pagaré (IOU), el oro no es fácil de transferir. Lleva días, si no semanas, transferir oro físico a una ubicación diferente o realizar una transacción.
El oro físico requiere medidas costosas de transporte y seguridad, mientras que el bitcoin se puede transferir a cualquier parte del mundo en menos de 20 minutos usando tu teléfono inteligente.
La descentralizaciónSe aplica tanto a la emisión como a la gobernanza de activos valiosos. La emisión y el gobierno del bitcoin están completamente descentralizados, ya que no hay una entidad central que emita o extraiga nuevos bitcoins, regule su suministro o gobierne la red.
El oro, por su parte, tiene un proceso minero muy centralizado, con solo unas pocas empresas mineras que controlan el mercado. Además su comercio también está muy centralizado, y las transacciones directas o entre personas son mínimas e ilegales en muchas partes del mundo.
DivisibilidadSignifica que el activo se puede dividir en componentes más pequeños. Este es un rasgo especialmente importante en el comercio y el intercambio de bienes. Puedes dividir el oro, pero difícilmente puedes hacerlo en casa.
Un solo bitcoin se puede dividir en 100,000,000 satoshi, y la cantidad más pequeña de satoshi que puedes transferir es de 546. ¿Te imaginas pagar por productos con granos de oro? La unidad más pequeña de oro, el «grano», pesa solo 0.0648 gramos.
La durabilidadEs un rasgo esencial de cada inversión a largo plazo o depósito de valor. Su riqueza debe almacenarse donde no se disuelva con el tiempo y permanecer en perfectas condiciones en los próximos años.
Las monedas fiduciarias, principalmente los billetes de banco, son propensas a daños físicos, descomposición u otras disminuciones de calidad. El bitcoin se almacena digitalmente y, por lo tanto, no puede deteriorarse. También es imposible destruir bitcoins.
El oro también es muy duradero y conserva bien sus características físicas, pero puede destruirse o devaluarse. Tanto el oro como el bitcoin son muy duraderos, pero por diferentes razones.
La fungibilidadEs la capacidad de un activo para ser intercambiado por otros bienes o activos. Los activos fungibles simplifican el proceso de intercambio y comercialización, ya que la fungibilidad implica el mismo valor entre los activos. Tanto el bitcoin como el oro son fáciles de intercambiar por diferentes activos o bienes, y ambos obtienen puntajes altos.
BonificaciónLa facilidad de uso y la conciencia es un rasgo que a menudo se olvida en el debate bitcoin vs.Oro. La facilidad de uso y las expectativas afectan directamente la demanda, y sabemos que el aumento de la demanda de un activo limitado influye positivamente en el precio. El modelo de oferta y demanda es el modelo principal de determinación de precios utilizado en la teoría económica.
El uso prolongado del oro le ha dado un estado casi «sagrado». El oro es un activo casi universalmente reconocido sin importar a dónde vaya en el mundo.
Sin embargo, el bitcoin todavía está emergiendo, y solo un porcentaje relativamente pequeño de la población mundial lo sabe. También debemos tener en cuenta que para que el activo sea ampliamente adoptado debe ser fácil de usar.
¿Qué debería comprar? ¿Oro o bitcoin?Siempre es mejor hacer tu propia investigación antes de invertir. Este artículo es una gran simplificación de un problema complejo, y no es fácil hacer predicciones basadas solo estos aspectos que hemos cubierto brevemente.
Estamos en un ecosistema criptográfico, por lo que es natural que gravitemos más hacia el bitcoin, pero no subestimemos el oro. El historial es claro.
Ambos demuestran ser una atractiva reserva de valor e inversiones a largo plazo. No esperes multiplicar tu riqueza de inmediato, invertir requiere paciencia, y entre todas las inversiones disponibles, el bitcoin y el oro favorecen especialmente a los inversores a mediano o largo plazo.
Con Binance puedes comprar bitcoins en monedas locales de Venezuela, Colombia y ArgentinaEn Binance, ahora con su plataforma P2P puedes comprar y vender bitcoins y otras criptomonedascon bolívares, pesos argentinos, colombianos, mexicanos, reales brasileños y soles peruanos.
Si todavía no has utilizado esta opción para comprar y vender bitcoins en tu moneda local puedes hacerlo en el siguiente enlace:
Theo dữ liệu tại CoinMarketCap, các tiền điện tử hàng đầu trải qua sự hồi sinh mạnh mẽ trong 6 tháng qua, giúp tổng vốn hóa lần đầu tiên vượt ngưỡng 300 tỷ USD trong nửa năm trở lại. Trong đó, Bitcoin đóng góp 63%.submitted by IntelligentDream1168 to u/IntelligentDream1168 [link] [comments]
Lúc 6h ngày 13/2, giá giao dịch mỗi Bitcoin trên sàn Bitsatmp là 10.367 USD, tiếp tục tăng 1,33% so với 24 giờ trước.
Khối lượng giao dịch tiền điện tử hàng đầu trong thời gian trên là 43 tỷ USD, vốn hóa ghi nhận mức 188,2 tỷ USD, theo CoinMarketCap.
Cùng với Bitcoin, các tiền điện tử hàng đầu cũng tiếp tục tăng trưởng mạnh. Ethereum hiện giao dịch mức 268 USD, tăng 13,6%, vốn hóa đạt 29,4 tỷ USD.
Ripple (XRP) cũng tăng trưởng mạnh mẽ trên 10%, nâng giá mỗi đồng XRP lên 0,307 USD.
Tezos, tiền điện tử xếp thứ 10 trên bảng xếp hạng tính theo vốn hóa (vượt qua Cardano, Monero, Stellar và TRON hôm đầu tuần) tiếp tục giữ vững phong độ với mức tăng 12,5% trong sáng nay, hiện giao dịch mức 3,24 USD.
Trong khi đó Litecoin, Binance Coin và Bitcoin Cash giữ đà tăng khá với mức tăng từ 3%-6,6%. Tether là tiền ảo có mức tăng ít nhất với 0,6%.
Theo dõi thị trường có thể thấy cả Bitcoin và nhóm tiền điện tử vốn hóa lớn đều tăng từ mức chạm đáy vào tháng 12/2019. Được dẫn dắt bởi Bitcoin, gần như tất cả các tiền ảo đang “hồi sinh”.
Bitcoin options are breaking records, and exchanges are competing for this segment. We will tell you what these tools are and how they worksubmitted by Smart_Smell to Robopay [link] [comments]
The cryptocurrency market is constantly evolving, integrating with the traditional and inheriting complex financial products such as futures and options.
Some types of fixed-term contracts are already firmly established in the bitcoin industry. This is noticeable by the activity of traders on the CME.
However, the situation with options is somewhat different. These derivatives are difficult to understand among ordinary market participants and are not yet so popular.
Nevertheless, there is a demand for such tools, as evidenced by the growth dynamics of this market segment and interest from platforms such as Binance and Bitfinex.
Bitcoin options have already been offered on CME, LedgerX and Bakkt, which are regulated and oriented primarily on whales. Among the unregulated sites, the leader is Deribit, followed by FTX and OKEx.
ForkLog magazine figured out what options are and what types of options are. We will talk about the features of these tools and the current state of affairs in the segment. In this article you will also find comments by leading market experts on the role of options in the industry.
What are options and how do they work?An option is a financial contract concluded between two parties — the holder and the seller. The first receives the right, but not the obligation, to buy or sell a certain amount of the underlying asset at the strike price (strike price) on a specific date (expiration date).
The seller undertakes to buy or sell the asset at the request of the option holder. The latter pays the seller at the time of purchase of the contract a certain amount of money — the so-called premium.
The rights and obligations of the holder and seller differ significantly. The former has the right to choose whether to exercise the option or not. The seller is obliged to fulfill the terms of the contract at the request of the holder.
Parameters such as the type of underlying asset, expiration date, strike price are fixed at the time of issue of the contract, after which they cannot be changed.
Like futures, options are derivative financial instruments and derivatives. This means that they can be based on various underlying assets (BA) — stocks, indices or cryptocurrencies.
“Like the options already existing in traditional finance for all major assets, there are contracts based on BTC and ETH on the cryptocurrency market. They are very interesting financial products“, said Su Zhu, head of Three Arrows Capital, in a conversation with ForkLog.
Options are used both for hedging risks and for speculative trading. For example, a speculator confident in the growth of the underlying asset buys a call option. If the BA price rises above the strike, the trader can use his contract to buy a discounted asset.
“Derivatives such as options allow users to hedge risks and generate revenue. Derivatives play a key role in the traditional financial market. These tools are needed so that the cryptocurrency market continues to grow and develop, being filled with new participants“, said Aaron Gong, vice president of Binance Futures.
Practical use of optionsConsider the simplest example of options hedging. Suppose there is a company manufacturing tomato paste, sauces and ketchups. There is a farmer supplying this company with tomatoes. He acts in conditions of fierce competition, close to perfect.
It is extremely important for a company to buy raw materials cheaper to minimize production costs and remain profitable. The farmer, in turn, hopes for a long-term cooperation with the company so as not to lose a major client.
The company offers the farmer an option, assuming the right to buy 10 tons of tomatoes of the next year’s crop at the current price — say, $1,000 per ton. To exercise this right, the company pays the farmer an option premium of 3% of the total transaction amount of $10,000, that is, $300.
The farmer will have to, at the request of the company, sell the appropriate quantity of goods at the above price and at a specified time.
A year later, the crop was high, which led to a decrease in the market value of tomatoes to $800 per ton. The company decides not to exercise its right to purchase raw materials for $10,000, as other farmers can buy the same 10 tons of tomatoes for only $8,000.
Thus, having lost only $300 as a premium on an option, the company is insured against price risk. Buying raw materials at a significantly lower market price is more than worth the price of the option contract.
Let’s imagine another scenario: the crop turned out to be unimportant and the price of scarce tomatoes jumped to $1200 per ton. Then the company will certainly take advantage of the right to purchase tomatoes for $1000. Thus, the result is any case.
It is easy to guess that the options can be used by miners to hedge the risks of adverse changes in the price of the extracted asset. For example, expecting a decrease in the price of BTC, miners can use options that give them the right to sell cryptocurrency in the future at a price higher than the breakeven point.
“Miners are already very active in options markets. And, probably, they will remain active“, Su Zhu said.
Su Zhu is confident that in the long term, options will make the cryptocurrency spot market more liquid and attractive to a wide range of participants. He added that the growing popularity of such contracts among miners could significantly reduce sales pressure.
“Options give miners the opportunity to fix the price of coins mined in the future. Miners can better manage their production costs and protect themselves from market volatility“, said Aaron Gong, expressing confidence that the popularity of options will continue to grow.
According to him, such tools open up new opportunities and may be of interest to speculators, funds and long-term cryptocurrency holders.
“Institutional investors are also showing growing interest in options and other derivatives. Last week it was reported that the famous Wall Street trader Paul Tudor Jones allocated a few percent from his Tudor BVI fund for bitcoin futures. This is a positive signal, which means that more and more institutions are interested in the cryptocurrency market“, Gong added.
However, option strategies are not suitable for every market participant — effective work with these tools requires certain experience, Co-founder of CoinIndex.agency Julia Sporysh is sure:
“Of course, in order to use this effectively, the miner must have an experienced trader (option strategies are some of the most difficult on the market) — or they will have to unite and work through specialized trading companies. This market exists, although it is not for the general public.”
Also, according to her, options may be of interest to funds and retail traders who have gained a hand in speculative trading.
“Options are an independent and good speculative tool. And if you have positions in futures or in the spot market, it’s just the time to explore new opportunities“, added Yulia Sporysh.
Types of optionsThere are two main types of options — option call and option put. The first gives the right to the contract holder to purchase a certain amount of the underlying asset from the seller (they also say — the inscription) at the strike price on a certain date in the future. This type of option was used in the tomato example.
The put option, on the contrary, gives the buyer of the contract the right to sell the underlying asset at a fixed price. The latter may be higher than the market at the time of expiration, which is beneficial to the trader.
Market participants use the call, predicting an increase in the price of BA, and put — expecting it to decline.
More complex strategies use combinations of these two types of contracts.
There is also the term “covered option”. For example, an option call is covered if the seller has the amount of the underlying asset corresponding to the terms of the contract.
Options may also differ in the style of execution — American or European.
European-style options require the holder to execute the contract exclusively on the expiration date. Such options, in particular, are presented at CME and Bakkt.
American style implies the possibility of contract execution at any time prior to the date of expiration. Options of both styles are traded all over the world, their names have no relation to geographic location.
There are less standardized, exotic options. However, the popularity and importance of such instruments in the financial market is not so great.
Parameters and conditions for trading certain options are described in the specifications for them, which indicate the expiration date, strike price and other elements of the contract.
Premium, strike price and cash optionThe option premium is the amount of money paid by the buyer to the seller. The premium is equal to the value of the contract and, in fact, represents a fee for the risk of adverse changes in the value of the underlying asset.
The option premium is formed by two components:
• Intrinsic value — the amount that the buyer would receive if the contract were currently executed. It depends on the ratio of the price of the underlying asset and the strike.
• Time value — depends on the time remaining until expiration. Usually, the less time it takes to execute a contract, the lower the premium.
As a rule, high price volatility contributes to premium growth, and vice versa. A deal with a close strike price in relation to the current one has much greater chances of closing in profit and, therefore, the premium for such an option will be relatively high.
The strike price is the price fixed in the option at which the buyer of the call option can buy (or sell, if this is a put option) the underlying asset. In turn, the seller of the contract is obliged to sell or buy BA.
Money is an indicator of the ability to receive funds from the exercise of the right to exercise a derivative. In the context of options, cash can be calculated by comparing the spot price of the BA and the strike price of the option. Thus, three options are possible:
• “in the money” option: in the case of a call — if the spot price is higher than the strike (then the intrinsic value of the contract is positive), in the case of a put, on the contrary, if the BA price is lower than the strike;
• option “on money” (or “with one’s own”) — equal strike to current stock quotes, intrinsic value equal to 0;
• the option “out of money” (“without money”) — the exercise of the option is not economically feasible; in such a situation, the current price of the underlying asset is lower than the strike price of the call option or, conversely, the spot price of the BA is higher than the strike price in the case of a put.
Option strategiesThere are many option trading strategies. Four basic approaches can be distinguished.
Long call — buying a call option, the investor expects an increase in the price of the underlying asset above the strike on the expiration date of the contract. Then he will be able to buy an asset at a discount to the market price and thus earn on the difference. If the price drops below the strike, the buyer risks only the premium paid for the option.
Long put — is a kind of alternative to a short position in the spot market. The buyer of the put option hopes to make money, assuming that the price of the BA falls below the strike at the time of expiration. In this scenario, the investor may sell the asset at a higher price than the market price.
Also, through a put option, an investor can limit the risk of a fall in the price of an asset that has a long position open. According to Su Zhu, miners may use the “protective put” strategy, in whose activity a substantial and prolonged drop in the price of mined cryptocurrency is undesirable. Through such tools, miners can provide profitable or even break-even activity.
Short call — the investor acts as the seller of the contract, counting on a decrease in the price of BA below the strike on the date of expiration. However, the higher the price of the asset, the more losses the inscription bears. Thus, the risk of the seller of the contract is unlimited, and the profit potential is limited by the premium on the sale of the call.
Short put — the seller of such an option expects a premium on it, being firmly convinced that the price of the BA will be higher than the strike.
Combinations of these basic strategies may underlie more sophisticated options trading approaches, such as:
• protective put — purchase of a put option for an available asset;
• covered (secured) call — an investor sells a call option to an existing BA or which will be acquired simultaneously with the sale of the option; the strategy reduces the risk of owning an asset, since a fall in its price is partially offset by a premium;
• straddle — a kind of bet on volatility, which implies the purchase of a call and put option on the same asset with the same expiration date and the same strike price;
• strangle — almost the same as straddle, differs only in different strike prices.
ConclusionsOptions are complex financial instruments, their mechanism of work is unlikely to be mastered immediately by most novice traders. Nevertheless, these derivatives may seem interesting to experienced market participants and, in particular, to miners.
The following advantages and disadvantages of options can be distinguished. Of the advantages of these contracts, we note:
- flexibility of use in speculative trading;
- the ability to use many combinations and trading strategies;
- a good tool for hedging risks;
- the ability to use in any trend — upward, downward, sideways.
- the difficulty of understanding the mechanism of work, especially for novice market participants;
- asymmetric conditions and, accordingly, risks for the buyer and seller;
- the complexity of trading strategies;
- the volatility of an option premium, which depends on the proximity of the expiration date and price dynamics in the spot market;
- low liquidity.
Different industry players have different cryptocurrency options. Some consider them promising tools useful for miners, funds, retail traders and the market as a whole. Others are convinced that such derivatives are archaism.
Nevertheless, options are gradually taking root in the cryptocurrency market. This is evident in the dynamics of trading volume and open interest. In addition, more and more exchanges are trying to add support for these contracts, which contributes to increased competition and further development of the industry.
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1. What is Bitcoin (BTC)?
2. Bitcoin’s core featuresFor a more beginner’s introduction to Bitcoin, please visit Binance Academy’s guide to Bitcoin.
Unspent Transaction Output (UTXO) modelA UTXO transaction works like cash payment between two parties: Alice gives money to Bob and receives change (i.e., unspent amount). In comparison, blockchains like Ethereum rely on the account model.
Nakamoto consensusIn the Bitcoin network, anyone can join the network and become a bookkeeping service provider i.e., a validator. All validators are allowed in the race to become the block producer for the next block, yet only the first to complete a computationally heavy task will win. This feature is called Proof of Work (PoW).
The probability of any single validator to finish the task first is equal to the percentage of the total network computation power, or hash power, the validator has. For instance, a validator with 5% of the total network computation power will have a 5% chance of completing the task first, and therefore becoming the next block producer.
Since anyone can join the race, competition is prone to increase. In the early days, Bitcoin mining was mostly done by personal computer CPUs.
As of today, Bitcoin validators, or miners, have opted for dedicated and more powerful devices such as machines based on Application-Specific Integrated Circuit (“ASIC”).
Proof of Work secures the network as block producers must have spent resources external to the network (i.e., money to pay electricity), and can provide proof to other participants that they did so.
With various miners competing for block rewards, it becomes difficult for one single malicious party to gain network majority (defined as more than 51% of the network’s hash power in the Nakamoto consensus mechanism). The ability to rearrange transactions via 51% attacks indicates another feature of the Nakamoto consensus: the finality of transactions is only probabilistic.
Once a block is produced, it is then propagated by the block producer to all other validators to check on the validity of all transactions in that block. The block producer will receive rewards in the network’s native currency (i.e., bitcoin) as all validators approve the block and update their ledgers.
Block productionThe Bitcoin protocol utilizes the Merkle tree data structure in order to organize hashes of numerous individual transactions into each block. This concept is named after Ralph Merkle, who patented it in 1979.
With the use of a Merkle tree, though each block might contain thousands of transactions, it will have the ability to combine all of their hashes and condense them into one, allowing efficient and secure verification of this group of transactions. This single hash called is a Merkle root, which is stored in the Block Header of a block. The Block Header also stores other meta information of a block, such as a hash of the previous Block Header, which enables blocks to be associated in a chain-like structure (hence the name “blockchain”).
An illustration of block production in the Bitcoin Protocol is demonstrated below.
Block time and mining difficultyBlock time is the period required to create the next block in a network. As mentioned above, the node who solves the computationally intensive task will be allowed to produce the next block. Therefore, block time is directly correlated to the amount of time it takes for a node to find a solution to the task. The Bitcoin protocol sets a target block time of 10 minutes, and attempts to achieve this by introducing a variable named mining difficulty.
Mining difficulty refers to how difficult it is for the node to solve the computationally intensive task. If the network sets a high difficulty for the task, while miners have low computational power, which is often referred to as “hashrate”, it would statistically take longer for the nodes to get an answer for the task. If the difficulty is low, but miners have rather strong computational power, statistically, some nodes will be able to solve the task quickly.
Therefore, the 10 minute target block time is achieved by constantly and automatically adjusting the mining difficulty according to how much computational power there is amongst the nodes. The average block time of the network is evaluated after a certain number of blocks, and if it is greater than the expected block time, the difficulty level will decrease; if it is less than the expected block time, the difficulty level will increase.
What are orphan blocks?In a PoW blockchain network, if the block time is too low, it would increase the likelihood of nodes producingorphan blocks, for which they would receive no reward. Orphan blocks are produced by nodes who solved the task but did not broadcast their results to the whole network the quickest due to network latency.
It takes time for a message to travel through a network, and it is entirely possible for 2 nodes to complete the task and start to broadcast their results to the network at roughly the same time, while one’s messages are received by all other nodes earlier as the node has low latency.
Imagine there is a network latency of 1 minute and a target block time of 2 minutes. A node could solve the task in around 1 minute but his message would take 1 minute to reach the rest of the nodes that are still working on the solution. While his message travels through the network, all the work done by all other nodes during that 1 minute, even if these nodes also complete the task, would go to waste. In this case, 50% of the computational power contributed to the network is wasted.
The percentage of wasted computational power would proportionally decrease if the mining difficulty were higher, as it would statistically take longer for miners to complete the task. In other words, if the mining difficulty, and therefore targeted block time is low, miners with powerful and often centralized mining facilities would get a higher chance of becoming the block producer, while the participation of weaker miners would become in vain. This introduces possible centralization and weakens the overall security of the network.
However, given a limited amount of transactions that can be stored in a block, making the block time too longwould decrease the number of transactions the network can process per second, negatively affecting network scalability.
3. Bitcoin’s additional features
Segregated Witness (SegWit)Segregated Witness, often abbreviated as SegWit, is a protocol upgrade proposal that went live in August 2017.
SegWit separates witness signatures from transaction-related data. Witness signatures in legacy Bitcoin blocks often take more than 50% of the block size. By removing witness signatures from the transaction block, this protocol upgrade effectively increases the number of transactions that can be stored in a single block, enabling the network to handle more transactions per second. As a result, SegWit increases the scalability of Nakamoto consensus-based blockchain networks like Bitcoin and Litecoin.
SegWit also makes transactions cheaper. Since transaction fees are derived from how much data is being processed by the block producer, the more transactions that can be stored in a 1MB block, the cheaper individual transactions become.
The legacy Bitcoin block has a block size limit of 1 megabyte, and any change on the block size would require a network hard-fork. On August 1st 2017, the first hard-fork occurred, leading to the creation of Bitcoin Cash (“BCH”), which introduced an 8 megabyte block size limit.
Conversely, Segregated Witness was a soft-fork: it never changed the transaction block size limit of the network. Instead, it added an extended block with an upper limit of 3 megabytes, which contains solely witness signatures, to the 1 megabyte block that contains only transaction data. This new block type can be processed even by nodes that have not completed the SegWit protocol upgrade.
Furthermore, the separation of witness signatures from transaction data solves the malleability issue with the original Bitcoin protocol. Without Segregated Witness, these signatures could be altered before the block is validated by miners. Indeed, alterations can be done in such a way that if the system does a mathematical check, the signature would still be valid. However, since the values in the signature are changed, the two signatures would create vastly different hash values.
For instance, if a witness signature states “6,” it has a mathematical value of 6, and would create a hash value of 12345. However, if the witness signature were changed to “06”, it would maintain a mathematical value of 6 while creating a (faulty) hash value of 67890.
Since the mathematical values are the same, the altered signature remains a valid signature. This would create a bookkeeping issue, as transactions in Nakamoto consensus-based blockchain networks are documented with these hash values, or transaction IDs. Effectively, one can alter a transaction ID to a new one, and the new ID can still be valid.
This can create many issues, as illustrated in the below example:
Since the transaction malleability issue is fixed, Segregated Witness also enables the proper functioning of second-layer scalability solutions on the Bitcoin protocol, such as the Lightning Network.
Lightning NetworkLightning Network is a second-layer micropayment solution for scalability.
Specifically, Lightning Network aims to enable near-instant and low-cost payments between merchants and customers that wish to use bitcoins.
Lightning Network was conceptualized in a whitepaper by Joseph Poon and Thaddeus Dryja in 2015. Since then, it has been implemented by multiple companies. The most prominent of them include Blockstream, Lightning Labs, and ACINQ.
A list of curated resources relevant to Lightning Network can be found here.
In the Lightning Network, if a customer wishes to transact with a merchant, both of them need to open a payment channel, which operates off the Bitcoin blockchain (i.e., off-chain vs. on-chain). None of the transaction details from this payment channel are recorded on the blockchain, and only when the channel is closed will the end result of both party’s wallet balances be updated to the blockchain. The blockchain only serves as a settlement layer for Lightning transactions.
Since all transactions done via the payment channel are conducted independently of the Nakamoto consensus, both parties involved in transactions do not need to wait for network confirmation on transactions. Instead, transacting parties would pay transaction fees to Bitcoin miners only when they decide to close the channel.
One limitation to the Lightning Network is that it requires a person to be online to receive transactions attributing towards him. Another limitation in user experience could be that one needs to lock up some funds every time he wishes to open a payment channel, and is only able to use that fund within the channel.
However, this does not mean he needs to create new channels every time he wishes to transact with a different person on the Lightning Network. If Alice wants to send money to Carol, but they do not have a payment channel open, they can ask Bob, who has payment channels open to both Alice and Carol, to help make that transaction. Alice will be able to send funds to Bob, and Bob to Carol. Hence, the number of “payment hubs” (i.e., Bob in the previous example) correlates with both the convenience and the usability of the Lightning Network for real-world applications.
Schnorr Signature upgrade proposalElliptic Curve Digital Signature Algorithm (“ECDSA”) signatures are used to sign transactions on the Bitcoin blockchain.
However, many developers now advocate for replacing ECDSA with Schnorr Signature. Once Schnorr Signatures are implemented, multiple parties can collaborate in producing a signature that is valid for the sum of their public keys.
This would primarily be beneficial for network scalability. When multiple addresses were to conduct transactions to a single address, each transaction would require their own signature. With Schnorr Signature, all these signatures would be combined into one. As a result, the network would be able to store more transactions in a single block.
The reduced size in signatures implies a reduced cost on transaction fees. The group of senders can split the transaction fees for that one group signature, instead of paying for one personal signature individually.
Schnorr Signature also improves network privacy and token fungibility. A third-party observer will not be able to detect if a user is sending a multi-signature transaction, since the signature will be in the same format as a single-signature transaction.
4. Economics and supply distributionThe Bitcoin protocol utilizes the Nakamoto consensus, and nodes validate blocks via Proof-of-Work mining. The bitcoin token was not pre-mined, and has a maximum supply of 21 million. The initial reward for a block was 50 BTC per block. Block mining rewards halve every 210,000 blocks. Since the average time for block production on the blockchain is 10 minutes, it implies that the block reward halving events will approximately take place every 4 years.
As of May 12th 2020, the block mining rewards are 6.25 BTC per block. Transaction fees also represent a minor revenue stream for miners.
However, none of these reasons have fully explained the persistence of Bitcoin SV’s sustained difficulty with its significantly lowest mining profitability in the first half of 2019. As a result, this finding posits whether mining activity might be irrational, possibly owing to political factors or other non-economically driven forces that are beyond the scope of this report.
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