Bitfinex is one of the oldest cryptocurrency exchanges, founded in 2012 and operated by the Hong Kong-based company iFinex Inc. Tether (USDT), the largest stablecoin by market cap, is also owned by iFinex Inc. The centralized exchange (CEX) platform was designed for professional traders and institutions, with support for both fiat and crypto. The exchange is considered one of the most liquid for BTC pairs and other major altcoins like ETH and XMR. To protect user assets, the platform offers both two-factor authentication and IP address monitoring.