Coins 5014
Exchanges 373
The total market capitalization $1965.64B
Turnover (24h) $752.44B
BTCProportion 43.07%

榜单

币种介绍

## **What Is Bitcoin (BTC)?**

Bitcoin is a decentralized cryptocurrency originally described in a 2008 [whitepaper](https://coinmarketcap.com/alexandria/glossary/whitepaper) by a person, or group of people, using the alias [Satoshi Nakamoto](https://coinmarketcap.com/alexandria/article/who-is-satoshi-nakamoto). It was launched soon after, in January 2009.

Bitcoin is a peer-to-peer online currency, meaning that all [transactions](https://coinmarketcap.com/alexandria/article/how-long-does-a-bitcoin-transaction-take) happen directly between equal, independent network participants, without the need for any intermediary to permit or facilitate them. Bitcoin was created, according to Nakamoto’s own words, to allow “online payments to be sent directly from one party 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 2020, 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 to use a decentralized ledger of transactions packaged in batches (called “blocks”) and secured by cryptographic algorithms — the whole system would later be dubbed “[blockchain](https://coinmarketcap.com/alexandria/glossary/blockchain).”

Just two months later, on January 3, 2009, Nakamoto mined the first block on the Bitcoin network, known as the [genesis block](https://coinmarketcap.com/alexandria/glossary/genesis-block), thus launching the world’s first cryptocurrency.

However, while Nakamoto was the original inventor of Bitcoin, as well as the author of its very first implementation, over the years a large number of people have contributed to 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 unique advantage comes from the fact that it was the very first cryptocurrency to appear on the market.

It has managed to create a global community and give birth to 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 and technological basis that subsequently inspired the development of thousands of competing projects.

[The entire cryptocurrency market](https://coinmarketcap.com/) — now worth more than $300 billion — 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 and 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](https://coinmarketcap.com/alexandria/article/what-are-cryptocurrencies), with a market capitalization that fluctuated between $100-$200 billion in 2020, owing in large part to the ubiquitousness of platforms that provide use-cases for BTC: [wallets](https://coinmarketcap.com/alexandria/article/how-to-use-a-bitcoin-wallet), exchanges, payment services, online games and more.

##### **Related Pages:**

Looking for market and blockchain data for BTC? Visit our [block explorer](https://blockchain.coinmarketcap.com/chain/bitcoin).

Want to buy Bitcoin? Use CoinMarketCap’s [guide](https://coinmarketcap.com/how-to-buy-bitcoin/).

#### **How Much Bitcoin Is in Circulation?**

Bitcoin’s total supply is limited by its software and will never exceed 21,000,000 coins. New coins are created during the process known as [“mining”](https://coinmarketcap.com/alexandria/article/how-long-does-it-take-to-mine-one-bitcoin): as transactions are relayed across the network, they get picked up by miners and 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 add to the blockchain. At the moment of Bitcoin’s launch, the reward was 50 bitcoins per block: this number gets [halved](https://coinmarketcap.com/halving/bitcoin/) 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 and 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 to accumulate significant amounts of coins via regular mining: Satoshi Nakamoto alone is believed to own over a million Bitcoin.

#### **How Is the Bitcoin Network Secured?**

Bitcoin is secured with the [SHA-256 algorithm](https://coinmarketcap.com/alexandria/glossary/sha-256), which belongs to the SHA-2 family of hashing algorithms, which is also used by its fork Bitcoin Cash ([BCH](https://coinmarketcap.com/currencies/bitcoin-cash/)), as well as several other cryptocurrencies.

#### **Where Can You Buy [Bitcoin] ([BTC])?**

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

* [Binance](https://coinmarketcap.com/exchanges/binance/)

* [Coinbase Pro](https://coinmarketcap.com/exchanges/coinbase-pro/)

* [OKEx](https://coinmarketcap.com/exchanges/okex/)

* [Kraken](https://coinmarketcap.com/exchanges/kraken/)

* [Huobi Global](https://coinmarketcap.com/exchanges/huobi-global/)

* [Bitfinex](https://coinmarketcap.com/exchanges/bitfinex/)

If you are new to crypto, use CoinMarketCap’s own [easy guide](https://coinmarketcap.com/how-to-buy-bitcoin/) to buying Bitcoin.

发行数据

发行时间

2009-01-03

发行价

--

发行总量

18.71M

最大发行量

21.00M

流通量

18.71M

流通占比

100.00%

上架交易所

334

核心算法

SHA256

共识机制

PoW

持币地址数

38.06M

发展历程

2008年10月31日
中本聪(Satoshi Nakamoto)发表比特币的创世论文:《比特币:一种点对点的现金支付系统》。
2009年1月
名为创世纪的第一个比特币区块被启动,中本聪通过挖矿的方式获得首批50个比特币,标志着比特币网络开始出现,比特币正式诞生。
2010年
5月,发生第一次比特币交易;7月,世界第一家比特币交易平台MT.GOX在东京创立;8月,攻击者利用整数溢出的漏洞凭空创造出1840亿个比特币;9月,世界上最早“矿池” Slush's pool,首次挖矿成功;中本聪隐退并将开发权转交给美国人加文·安德森。
2011年
官方有历史记载的0.3.21版本上线,支持包括UPNP、以聪为单位等新特性,比特币系统逐渐成熟。
2012年
9月,比特币基金创立;11月28日,区块供应量首次减半调整。
2013年
出现分叉问题;第一台比特币ATM诞生;发生首起比特币盗窃事件;美国金融犯罪调查合作局(FINCEN)发布了全球第一个虚拟货币管理规范;德国承认比特币合法地位;中国发布《关于防范比特币风险的通知》,明确比特币不具与货币等同的法律地位。
2014年
比特币网络算力达到100PH/S;HMRC(英国税务局)将比特币归类为资产或私人资金,意味着比特币的采矿或交换不会收取增值税;美国政府拍卖超过29000个从丝绸之路没收的比特币,表明比特币不再被视为非法交易货币;进行第一笔比特币衍生品交易;微软、戴尔等接受比特币支付。
2015年
coinbase交易所开启,美国第一家合规化的比特币交易所上线;估计有16万商户接受比特币付款。
2016年
比特币网络算力超过1EH/S;7月9日,比特币迎来新一波减半
2017年
比特币分叉出BTG和BCH两种货币;芝加哥期权交易所(Cboe)推出比特币期货合约。
2020年5月
比特币奖励第三次减半,从12.5个BTC减至6.25
2008-08-18
Satoshi Nakamoto注册Bitcoin.org域。
2009-01-09
比特币发布开源客户端:它可以从SourceForge下载。 从这里开始,任何technologically-literate人可以下载客户端和开始采矿对比特币。
2009-01-12
第一个比特币交易:哈尔芬尼的名字再次出现在1月12日,2009年是第一个比特币交易日期。Satoshi发送哈尔芬尼10比特币作为测试事务。到目前为止,比特币从来没有转移:只有被开采。
2010-05-22
有人用比特币买披萨:在这个日期,是比特币价值在真实世界体现的第一次。一个名叫Laszlo Hanyecz花10000 BTC,买了两个披萨。在今天,它被称为“比萨日”加密的社区。
2010年7月
Mt . Gox网站建立:Mt . Gox允许用户购买和出售比特币。 到2013年,Mt . Gox负责处理有关三分之二的比特币支付。
2014-12-11
微软允许用户在网上使用比特币支付应用,游戏,视频,在线商店。
2017-12-17
比特币触及19783 .06点美元的高点。 在一天结束的时候,比特币将降至19500美元。总的来说,比特币的价格1月1日至12月17日上涨了1824%。

开发进展

C++ 最后更新 28 mins ago
TypeScript 最后更新 16 hrs ago
Java 最后更新 1 days ago
Python 最后更新 3 days ago

团队信息

加文·安德烈森

前比特币首席开发者,比特币基金会创始人

Jonas Schnelli

比特币核心开发人员和维护者

Luke Dash Jr

比特币核心开发人员

Matt Corallo

Bitcoin Core开发团队成员

Peter Todd

比特币核心开发人员

Pieter Wuille

比特币核心开发人员,Blockstream联合创始人兼核心开发者。

Wladimir J. van der Laan

比特币存储库首席维护者

中本聪

创始人