Giá bitcoin hôm nay

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BTC Price Live Data

The live Bitcoin price today is $39,234.06 USD with a 24-hour trading volume of $31,919,695,875 USD. We update our BTC to lớn USD price in real-time. Bitcoin is up 2.13% in the last 24 hours. The current ranking is #1, with a live market cap of $746,397,099,894 USD. It has a circulating supply of 19,024,212 BTC coins & a max. Supply of 21,000,000 BTC coins.

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If you would like to know where lớn buy Bitcoin at the current rate, the đứng đầu cryptocurrency exchanges for trading in Bitcoin stock are currently Binance, OKX, Bybit, CoinFLEX, và FTX. You can find others listed on our crypto exchanges page.

What Is Bitcoin (BTC)?

Bitcoin is a decentralized cryptocurrency originally described in a 2008 whitepaper by a person, or group of people, using the alias Satoshi Nakamoto. It was launched soon after, in January 2009.

Bitcoin is a peer-to-peer online currency, meaning that all transactions happen directly between equal, independent network participants, without the need for any intermediary to permit or facilitate them. Bitcoin was created, according to lớn Nakamoto’s own words, to lớn allow “online payments to be sent directly from one tiệc nhỏ to another without going through a financial institution.”

Some concepts for a similar type of a decentralized electronic currency precede BTC, but Bitcoin holds the distinction of being the first-ever cryptocurrency to come into actual use.

Who Are the Founders of Bitcoin?

Bitcoin’s original inventor is known under a pseudonym, Satoshi Nakamoto. As of 2021, the true identity of the person — or organization — that is behind the alias remains unknown.

On October 31, 2008, Nakamoto published Bitcoin’s whitepaper, which described in detail how a peer-to-peer, online currency could be implemented. They proposed lớn use a decentralized ledger of transactions packaged in batches (called “blocks”) & secured by cryptographic algorithms — the whole system would later be dubbed “blockchain.”

Just two months later, on January 3, 2009, Nakamoto mined the first block on the Bitcoin network, known as the genesis block, thus launching the world’s first cryptocurrency. Bitcoin price was $0 when first introduced, & most Bitcoins were obtained via mining, which only required moderately powerful devices (e.g. PCs) & mining software. The first known Bitcoin commercial transaction occurred on May 22, 2010, when programmer Laszlo Hanyecz traded 10,000 Bitcoins for two pizzas. At Bitcoin price today in mid-September 2021, those pizzas would be worth an astonishing $478 million. This sự kiện is now known as “Bitcoin Pizza Day.” In July 2010, Bitcoin first started trading, with the Bitcoin price ranging from $0.0008 to $0.08 at that time.

However, while Nakamoto was the original inventor of Bitcoin, as well as the author of its very first implementation, he handed the network alert key và control of the code repository khổng lồ Gavin Andresen, who later became lead developer at the Bitcoin Foundation. Over the years a large number of people have contributed khổng lồ improving the cryptocurrency’s software by patching vulnerabilities and adding new features.

Bitcoin’s source code repository on GitHub lists more than 750 contributors, with some of the key ones being Wladimir J. Van der Laan, Marco Falke, Pieter Wuille, Gavin Andresen, Jonas Schnelli and others.

What Makes Bitcoin Unique?

Bitcoin’s most quality advantage comes from the fact that it was the very first cryptocurrency to lớn appear on the market.

It has managed to lớn create a global community and give birth khổng lồ an entirely new industry of millions of enthusiasts who create, invest in, trade and use Bitcoin and other cryptocurrencies in their everyday lives. The emergence of the first cryptocurrency has created a conceptual & technological basis that subsequently inspired the development of thousands of competing projects.

The entire cryptocurrency market — now worth more than $2 trillion — is based on the idea realized by Bitcoin: money that can be sent and received by anyone, anywhere in the world without reliance on trusted intermediaries, such as banks & financial services companies.

Thanks to its pioneering nature, BTC remains at the top of this energetic market after over a decade of existence. Even after Bitcoin has lost its undisputed dominance, it remains the largest cryptocurrency, with a market capitalization that surpassed the $1 trillion mark in 2021, after Bitcoin price hit an all-time high of $64,863.10 on April 14, 2021. This is owing in large part to lớn growing institutional interest in Bitcoin, & the ubiquitousness of platforms that provide use-cases for BTC: wallets, exchanges, payment services, online games và more.

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How Much Bitcoin Is in Circulation?

Bitcoin’s total supply is limited by its software & will never exceed 21,000,000 coins. New coins are created during the process known as “mining”: as transactions are relayed across the network, they get picked up by miners và packaged into blocks, which are in turn protected by complex cryptographic calculations.

As compensation for spending their computational resources, the miners receive rewards for every block that they successfully địa chỉ to the blockchain. At the moment of Bitcoin’s launch, the reward was 50 bitcoins per block: this number gets halved with every 210,000 new blocks mined — which takes the network roughly four years. As of 2020, the block reward has been halved three times và comprises 6.25 bitcoins.

Bitcoin has not been premined, meaning that no coins have been mined and/or distributed between the founders before it became available to the public. However, during the first few years of BTC’s existence, the competition between miners was relatively low, allowing the earliest network participants lớn accumulate significant amounts of coins via regular mining: Satoshi Nakamoto alone is believed to own over a million Bitcoin.

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Mining Bitcoins can be very profitable for miners, depending on the current hash rate & the price of Bitcoin. While the process of mining Bitcoins is complex, we discuss how long it takes to lớn mine one Bitcoin on Alexandria — as we wrote above, mining Bitcoin is best understood as how long it takes khổng lồ mine one block, as opposed to one Bitcoin. As of mid-September 2021, the Bitcoin mining reward is capped to lớn 6.25 BTC after the 2020 halving, which is roughly $299,200 in Bitcoin price today.

How Is the Bitcoin Network Secured?

Bitcoin is secured with the SHA-256 algorithm, which belongs to lớn the SHA-2 family of hashing algorithms, which is also used by its fork Bitcoin Cash (BCH), as well as several other cryptocurrencies.

Bitcoin Energy Consumption

Over the past few decades, consumers have become more curious about their energy consumption & personal effects on climate change. When news stories started swirling regarding the possible negative effects of Bitcoin’s energy consumption, many became concerned about Bitcoin và criticized this energy usage. A report found that each Bitcoin transaction takes 1,173 KW hours of electricity, which can “power the typical American trang chủ for six weeks.” Another report calculates that the energy required by Bitcoin annually is more than the annual hourly energy usage of Finland, a country with a population of 5.5 million.

The news has produced commentary from tech entrepreneurs to environmental activists khổng lồ political leaders alike. In May 2021, Tesla CEO Elon Musk even stated that Tesla would no longer accept the cryptocurrency as payment, due khổng lồ his concern regarding its environmental footprint. Though many of these individuals have condemned this issue and move on, some have prompted solutions: how bởi we make Bitcoin more energy efficient? Others have simply taken the defensive position, stating that the Bitcoin energy problem may be exaggerated.

At present, miners are heavily reliant on renewable energy sources, with estimates suggesting that Bitcoin’s use of renewable energy may span anywhere from 40-75%. However, khổng lồ this point, critics claim that increasing Bitcoin’s renewable energy usage will take away from solar sources powering other sectors & industries like hospitals, factories or homes. The Bitcoin mining community also attests that the expansion of mining can help lead to the construction of new solar and wind farms in the future.

Furthermore, some who defend Bitcoin argue that the gold and banking sector — individually — consume twice the amount of energy as Bitcoin, making the criticism of Bitcoin’s energy consumption a nonstarter. Moreover, the energy consumption of Bitcoin can easily be tracked and traced, which the same cannot be said of the other two sectors. Those who defend Bitcoin also cảnh báo that the complex validation process creates a more secure transaction system, which justifies the energy usage.

Another point that Bitcoin proponents make is that the energy usage required by Bitcoin is all-inclusive such that it encompasess the process of creating, securing, using and transporting Bitcoin. Whereas with other financial sectors, this is not the case. For example, when calculating the carbon footprint of a payment processing system lượt thích Visa, they fail khổng lồ calculate the energy required to print money or power nguồn ATMs, or smartphones, bank branches, security vehicles, among other components in the payment processing & banking supply chain.

What exactly are governments & nonprofits doing lớn reduce Bitcoin energy consumption? Earlier this year in the U.S., a congressional hearing was held on the topic where politicians and tech figures discussed the future of crypto mining in the U.S, specifically highlighting their concerns regarding fossil fuel consumption. Leaders also discussed the current debate surrounding the coal-to-crypto trend, particularly regarding the number of coal plants in thủ đô new york and Pennsylvania that are in the process of being repurposed into mining farms.

Aside from congressional hearings, there are private sector crypto initiatives dedicated to solving environmental issues such as the Crypto Climate Accord & Bitcoin Mining Council. In fact, the Crypto Climate Accord proposes a plan to lớn eliminate all greenhouse gas emissions by 2040, And, due lớn the innovative potential of Bitcoin, it is reasonable lớn believe that such grand plans may be achieved.

What Is Bitcoin’s Role as a Store of Value?

Bitcoin is the first decentralized, peer-to-peer digital currency. One of its most important functions is that it is used as a decentralized store of value. In other words, it provides for ownership rights as a physical asset or as a unit of account. However, the latter store-of-value function has been debated. Many crypto enthusiasts & economists believe that high-scale adoption of the vị trí cao nhất currency will lead us lớn a new modern financial world where transaction amounts will be denominated in smaller units.

The smallest units of Bitcoin, 0.00000001 BTC, are called Satoshis (or Sats in short), in a nod khổng lồ the pseudonymous creator. At Bitcoin price now, 1 Satoshi is equivalent lớn roughly $0.00048.

The đứng top crypto is considered a store of value, like gold, for many — rather than a currency. This idea of the first cryptocurrency as a store of value, instead of a payment method, means that many people buy the crypto and hold onto it long-term (or HODL) rather than spending it on items like you would typically spend a dollar — treating it as digital gold.

Crypto Wallets

The most popular wallets for cryptocurrency include both hot và cold wallets. Cryptocurrency wallets vary from hot wallets and cold wallets. Hot wallets are able khổng lồ be connected to the web, while cold wallets are used for keeping large amounts of coins outside of the internet.

Some of the top crypto cold wallets are Trezor, Ledger & CoolBitX. Some of the đứng đầu crypto hot wallets include Exodus, Electrum and Mycelium.

Still not sure of which wallet to lớn use? check out Alexandria’s guide on the đứng top cold wallets of 2021 and top hot wallets of 2021.

How Is Bitcoin’s technology Upgraded?

A hard fork is a radical change lớn the protocol that makes previously invalid blocks/transactions valid, & therefore requires all users to lớn upgrade. For example, if users A & B are disagreeing on whether an incoming transaction is valid, a hard fork could make the transaction valid lớn users A và B, but not to user C.

A hard fork is a protocol nâng cấp that is not backward compatible. This means every node (computer connected to the Bitcoin network using a client that performs the task of validating và relaying transactions) needs to lớn upgrade before the new blockchain with the hard fork activates và rejects any blocks or transactions from the old blockchain. The old blockchain will continue to lớn exist và will continue lớn accept transactions, although it may be incompatible with other newer Bitcoin clients.

A soft fork is a change khổng lồ the Bitcoin protocol wherein only previously valid blocks/transactions are made invalid. Since old nodes will recognise the new blocks as valid, a soft fork is backward-compatible. This kind of fork requires only a majority of the miners upgrading lớn enforce the new rules.

Some examples of prominent cryptocurrencies that have undergone hard forks are the following: Bitcoin’s hard fork that resulted in Bitcoin Cash, Ethereum’s hard fork that resulted in Ethereum Classic.

Bitcoin Cash has been hard forked since its original forking, with the creation of Bitcoin SV. Read more about the difference between Bitcoin, Bitcoin Cash & Bitcoin SV here.

What Is Taproot?

Taproot is a soft fork that bundles together BIP 340, 341 và 342 và aims khổng lồ improve the scalability, efficiency, và privacy of the blockchain by introducing several new features.

The two major changes are the introduction of the Merkelized Abstract Syntax Tree (MAST) & Schnorr Signature. MAST introduces a condition allowing the sender and recipient of a transaction khổng lồ sign off on its settlement together. Schnorr Signature allows users to lớn aggregate several signatures into one for a single transaction. This results in multi-signature transactions looking the same as regular transactions or more complex ones. By introducing this new address type, users can also save on transaction fees, as even complex transactions look like simple, single-signature ones.

Although HODLers will probably not notice a big impact, Taproot could become a key milestone to equipping the network with smart contract functionality. In particular, Schnorr Signatures would lay the foundation for more complex applications khổng lồ be built on đứng đầu of the existing blockchain, as users start switching khổng lồ Taproot addresses primarily. If adopted by users, Taproot could, in the long run, result in the network developing its own DeFi ecosystem that rivals those on alternative blockchains like Ethereum.

What Is the Lightning Network?

The Lightning Network is an off-chain, layered payment protocol that operates bidirectional payment channels which allows instantaneous transfer with instant reconciliation. It enables private, high volume & trustless transactions between any two parties. The Lightning Network scales transaction capacity without incurring the costs associated with transactions & interventions on the underlying blockchain.

How Much Is Bitcoin?

The current valuation of Bitcoin is constantly moving, all day every day. It is a truly global asset. From a start of under one cent per coin, BTC has risen in price by thousands of percent lớn the numbers you see above. The prices of all cryptocurrencies are quite volatile, meaning that anyone’s understanding of how much Bitcoin is will change by the minute. However, there are times when different countries & exchanges show different prices and understanding how much Bitcoin is will be a function of a person’s location.

Is Bitcoin Political?

Bitcoin is becoming more political by the day, particularly after El Salvador began accepting it as legal tender. The country's president, Nayib Bukele, announced & implemented the decision almost unilaterally, dismissing criticism from his citizens, the ngân hàng of England, the IMF, Vitalik Buterin and many others. Since the Bitcoin law was passed in September 2021, Bukele has also announced plans to lớn build Bitcoin City, a city fully based on mining Bitcoin with geothermal energy from volcanoes.

Countries like Mexico, Russia and others have been rumored khổng lồ be candidates also khổng lồ accept Bitcoin as legal tender, but thus far, El Salvador stands alone.

Where Can You Buy Bitcoin (BTC)?

Bitcoin is, in many regards, almost synonymous with cryptocurrency, which means that you can buy Bitcoin on virtually every crypto exchange — both for fiat money and other cryptocurrencies. Some of the main markets where BTC trading is available are:

If you are new to lớn crypto, use’s own educational portal — Alexandria — to learn how khổng lồ start buying Bitcoin và other cryptocurrencies.

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To kiểm tra Bitcoin price live in the fiat currency of your choice, you can use’s converter feature directly on the Bitcoin currency page.

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