$BTC A coin pair with BTC (Bitcoin) refers to the trading relationship between Bitcoin and another cryptocurrency, such as ETH/BTC or ADA/BTC. In these pairs, Bitcoin acts as the base or quote currency, enabling traders to buy or sell altcoins using BTC. These pairs are common on major crypto exchanges and allow users to diversify portfolios, hedge risks, or speculate on price movements. For example, in the ETH/BTC pair, a trader exchanges Ethereum relative to Bitcoin’s value. BTC pairs offer high liquidity and are vital for technical analysis, arbitrage opportunities, and trading strategies in the broader cryptocurrency market.