A BTC coin pair represents the exchange rate between Bitcoin (BTC) and another cryptocurrency or fiat currency. In a pair like BTC/USDT, Bitcoin is the base currency, and Tether (USDT) is the quote currency. This means the price indicates how much USDT is needed to purchase one BTC. BTC pairs are popular due to their high liquidity and are commonly used for trading on platforms like Binance and Coinbase . They allow traders to diversify their portfolios and hedge against market volatility by facilitating direct exchanges between Bitcoin and other assets.