$BTC A coin pair, such as BTC/USDT, represents two cryptocurrencies traded against each other on an exchange. In the BTC/USDT pair, Bitcoin (BTC) is the base currency, while Tether (USDT), a stablecoin, is the quote currency. This means traders are buying or selling Bitcoin using Tether. The price of the pair indicates how much USDT is needed to purchase one BTC. Coin pairs are crucial for trading, providing flexibility and allowing users to profit from price fluctuations. Popular BTC pairs include BTC/USDT, BTC/ETH, and BTC/USD, offering various options for traders depending on their preferences and strategies.