BTC dominance is a measure used in the crypto market to indicate the share of the total market capitalization that is dominated by Bitcoin (BTC). It is calculated by dividing Bitcoin's market capitalization by the total market capitalization of all crypto digital assets in existence at the time, then multiplying by 100 to get the percentage. BTC dominance is an important indicator that provides insight into how much influence Bitcoin has on the crypto market as a whole. The higher the BTC dominance, the greater the influence of Bitcoin in the crypto market, while the lower it is, the more significant the role of other crypto digital assets.