$BTC A coin pair refers to the pairing of two cryptocurrencies for trading purposes. In the case of BTC (Bitcoin), a coin pair would involve Bitcoin and another cryptocurrency, such as Ethereum (ETH) or Tether (USDT). For example, the BTC/USDT pair allows traders to buy or sell Bitcoin using Tether. The value of the pair is determined by the exchange rate between the two cryptocurrencies. This pairing enables traders to speculate on price movements, hedge risks, or convert between different cryptocurrencies. Popular exchanges like Binance, Coinbase, or Kraken offer various BTC pairs for trading.