What Is Bitcoin Dominance?
Bitcoin dominance is Bitcoin's market capitalization as a percentage of the total crypto market cap. It shows Bitcoin's relative weight in the market and is widely used to gauge shifts between Bitcoin and altcoins.
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Bitcoin dominance is Bitcoin’s market capitalization expressed as a percentage of the total crypto market cap. It measures Bitcoin’s relative weight in the market, and traders watch it to gauge how money is shifting between Bitcoin and altcoins. On charting platforms it usually appears under the ticker BTC.D.
How is Bitcoin dominance calculated?
The formula is simple: Bitcoin market cap ÷ total crypto market cap × 100, where market cap is price multiplied by circulating supply. In a hypothetical example, if Bitcoin is worth $1.2 trillion and the whole market $2 trillion, dominance is 60%.
That doesn’t mean 60% of all money in crypto went into Bitcoin. Market cap applies the latest trade price to the entire supply, so it is a theoretical figure rather than a measure of cash flowing in or out.
Dominance also depends on the denominator. Hundreds of new tokens list every day, so the total market cap can grow even when nothing changes for Bitcoin, which can structurally drag its share down on long-term charts.
What does rising or falling dominance mean?
Rising dominance means Bitcoin is outperforming the rest of the market. That can happen when Bitcoin rises faster than altcoins, or when the whole market falls but Bitcoin falls less. Falling dominance means altcoins are relatively stronger.
Crucially, dominance can rise while Bitcoin’s price falls. If Bitcoin drops 5% and altcoins drop 15% in aggregate, Bitcoin’s share grows. So the ratio alone doesn’t tell you whether Bitcoin is being bought or sold; absolute price moves and relative share answer different questions.
Bitcoin dominance and altcoin season
A popular reading is that periods of sharply falling Bitcoin dominance mark an “altcoin season”. The classic example is the 2017–2018 ICO boom: Bitcoin dominance stood above 80% in early 2017 and dropped below 40% by early 2018 as money poured into new tokens.
Falling dominance doesn’t mean every altcoin rises together, though. A few large assets can drive the total while most small projects go their own way. No single dominance level guarantees an altcoin season. Reading dominance alongside price, volume and market breadth gives a more reliable picture.
Why do data providers show different numbers?
What counts toward the total market cap changes the result. Thousands of tiny tokens, wrapped tokens and stablecoins are handled differently from one source to another, so a gap of a few percentage points between sites is normal.
As stablecoins have grown into a large share of the market, some analysts prefer a version of dominance that excludes them. When investors rotate into stablecoins during a sell-off, dominance can shift even if Bitcoin’s price barely moves.
Frequently asked questions
Where can I track Bitcoin dominance?
Data sites such as CoinMarketCap and CoinGecko, as well as charting platforms, publish dominance charts. Our Bitcoin page also shows current market data.
Is there such a thing as Ethereum dominance?
Yes. The same formula works for any asset, and Ethereum dominance and stablecoin dominance are both widely followed.