Dominance du Bitcoin

Bitcoin Dominance = Bitcoin's market capitalization ÷ the total market capitalization of all cryptocurrencies × 100%. It is not an on-chain metric but a market-structure one: it measures how much of the entire crypto asset pool's pricing weight capital assigns to Bitcoin. This site's data comes from bitcoin-data.com, which defines it as the percentage of the total value of all cryptocurrencies corresponding to Bitcoin. Major tickers (CoinMarketCap, CoinGecko, TradingView's BTC.D) use broadly similar definitions, but denominator coverage differs enough to shift readings by a percentage point or more — compare trends across sites, not decimals.

Dominance swings are the thermometer of capital rotation inside crypto. Rising dominance has two classic drivers: risk-off rotation (bear-market capital retreating from alts into Bitcoin or exiting via BTC pairs) and Bitcoin-specific flows (e.g. the 2024 spot-ETF channel, whose incremental capital bought essentially only BTC). Falling dominance usually maps to altseason — mid-to-late bull risk appetite spilling down the BTC → ETH → mid-cap chain. The classic shape: Bitcoin rallies with dominance rising, then Bitcoin ranges while alts catch up and dominance rolls over — that inflection is widely used as a bull-phase transition marker.

A caveat this page owes you: whether stablecoins sit in the denominator materially changes the reading. USDT, USDC and peers persistently account for several percent of total crypto market cap; including them suppresses dominance, and since stablecoin cap holds up in bears, it also distorts bear-market readings upward for the denominator. Mainstream aggregators (e.g. CoinGecko) include stablecoins by default, while some analysts prefer a stablecoin-excluded 'real dominance.' bitcoin-data.com's public documentation does not state whether its denominator excludes stablecoins, and this site displays its raw values — treat this curve as a trend indicator, and align definitions before comparing against other sites.

Three. Dominance is relative: rising dominance does not mean Bitcoin is rising — in bears, Bitcoin merely falling slower than alts pushes it up just the same. The denominator carries a long tail of illiquid tokens with inflated caps, making total crypto market cap itself a watery statistic. And the alt landscape restructures every cycle (2017 ICO tokens, 2021 DeFi/NFT, the post-2024 ETF era), so identical dominance levels across cycles are not comparable. Within this site's window, dominance bottomed near 36% in September 2022 and peaked near 63% in July 2025.

Complement the macro view with total market cap and futures open interest.