$BTC Bitcoin (BTC) pairs are essential in the crypto trading world. A BTC pair means you’re trading another cryptocurrency against Bitcoin, like ETH/BTC or ADA/BTC. Instead of using USD or your local currency, you use BTC as the base. These pairs help traders measure the strength of altcoins relative to Bitcoin. When the price of an altcoin rises in BTC terms, it means it's outperforming Bitcoin. BTC pairs are popular on major exchanges and often offer more liquidity. Understanding BTC pairs is key for spot traders aiming to maximize profits during Bitcoin dominance shifts and altcoin seasons. Always research before trading.