Bitfinex is one of the world's largest and most advanced bitcoin trading platforms, supporting the trading of virtual currency such as Ethereum, Bitcoin, Litecoin and Ether Classic. The daily turnover is more than RMB 3 billion. Provide currency transactions, dollar and currency transactions. Registration is very simple. In 2016, Bitfinex had about 120,000 bitcoins stolen through social media. Affected by this incident, bitcoin prices fell by 20%.