Bitfinex is a veteran crypto exchange, and for a long term, Bitfinex was standing out as the leading exchange by trading volume. Bitfinex has a ‘regular’ exchange featuring many of the top 1000 altcoins. Bitfinex also owns ETHfinex which is the corresponding exchange for ERC-20 based tokens.
The exchange also offers margin trading features, with leverage of up to 3.3x. As similar to Poloniex, Bitfinex offers its users to borrow funds for larger margin positions.
Amongst the superlatives, there were some speculations around Bitfinex, some of them are also related to Tether in the field of price manipulations. There is tight relationship between Bitfinex and Tether, as the exchange promotes the first stable coin. Bitfinex is also among the exchanges that got hacked.