CoinucationBitcoin Dominance
Bitcoin dominance is Bitcoin's share of the total crypto market cap, used as a gauge of whether money is flowing into or out of altcoins.
Dominance measures one asset's market cap as a percentage of the entire crypto market. The term almost always refers to Bitcoin dominance. If Bitcoin is worth 1.5 trillion dollars and all crypto assets together are worth 3 trillion dollars, Bitcoin dominance is 50 percent. Ethereum dominance and stablecoin dominance are also tracked.
Bitcoin dominance was above 90 percent in the early years, fell to the 30 to 40 percent range during the 2017 and 2021 altcoin booms, and spent much of 2024 and 2025 in the 50 to 65 percent range. Rising dominance usually means Bitcoin is outperforming altcoins or that altcoins are falling faster in a downturn. Falling dominance often signals an altcoin season, when capital rotates into smaller assets.
Dominance is a ratio, not a price. It can rise while Bitcoin's dollar value falls, as long as altcoins fall more. Traders watch it mainly for rotation signals rather than as a stand-alone indicator. Note that stablecoins count toward the total market cap, so growth in stablecoin supply slightly lowers Bitcoin dominance even when no other prices change.
What is market cap? covers this in 6 minutes, with a quiz at the end.