Market Dominance

Market dominance expresses one asset’s market capitalization as a share of the aggregate crypto market cap, with Bitcoin dominance the most cited figure. Because it is a ratio, it moves with both the numerator and the denominator: dominance can rise in a falling market simply because the rest of the space falls faster. Analysts use it as a sentiment and rotation gauge — falling BTC dominance is often read as an "altcoin season", rising dominance as a flight to relative quality. The metric is sensitive to how the index defines the total (whether stablecoins are included), so the same day can show different dominance figures across providers.

In plain English — Market dominance is the percentage of the entire crypto market’s value held by a single asset — most often Bitcoin ("BTC dominance"). It is a relative measure: it can rise either because that asset gains or because the rest of the market falls. Traders watch dominance as a rough read on whether capital is rotating into Bitcoin versus smaller "altcoins".

If total crypto market cap is $2.4 trillion and Bitcoin’s cap is $1.2 trillion, BTC dominance is 50%. If dominance then climbs to 55% while total cap is flat, it suggests money rotating out of altcoins and into Bitcoin.