What is Bitcoin dominance?

Bitcoin dominance is the percentage of total crypto market capitalization that Bitcoin represents. It is one of the most useful single navigation indicators in the entire space, because it tells you in real time how capital is rotating within crypto. Most working analysts use the dominance chart as one of their three or four daily checks.

The basic mechanics. Total crypto market cap is the sum of every cryptocurrency's market cap (price × circulating supply). Bitcoin dominance is Bitcoin's market cap divided by the total. The metric has ranged from over 95% (early in Bitcoin's history, when there were essentially no major alternatives) to as low as ~38% during peak altcoin frenzy in 2017-2018. The 2024-2026 range has typically run between 50% and 65%, with movement within that range telling you a lot about where capital is going.

How to read dominance changes. When Bitcoin dominance is rising and total crypto market cap is roughly flat, capital is rotating out of altcoins and into Bitcoin (a "flight to quality" within crypto). When dominance is falling and total market cap is rising, capital is rotating from Bitcoin into altcoins (the classic "altseason" pattern). When dominance is rising and total cap is rising, Bitcoin is leading the move but altcoins are following at lower velocity. When dominance is falling and total cap is falling, altcoins are getting destroyed faster than Bitcoin (the worst phase of a downcycle for altcoin holders).

The most important pattern: dominance tells you cycle position within crypto. Bitcoin typically leads new cycles — institutional buyers and conservative crypto-native capital deploy first into Bitcoin as the asset they're most confident about. As the cycle expands, capital rotates from Bitcoin into Ethereum (then mid-cap altcoins, then small-cap altcoins) in a "risk-on" cascade. The cycle peaks when dominance has bottomed and small-cap altcoins are running ahead of large-caps in performance. The cycle inflects when dominance starts rising again — capital flowing back to Bitcoin (and out of altcoins) is typically the leading indicator of a broader risk-off rotation.

Several refinements worth knowing.

The denominator matters. Some analysts exclude stablecoins from the total crypto market cap calculation, which produces a "Bitcoin dominance ex-stables" metric. This is often more useful for cycle analysis because stablecoin supply fluctuations don't reflect risk-on/risk-off rotation.

The ETH/BTC ratio is the alt cycle indicator. Within the broader dominance framework, the ratio of Ethereum's market cap to Bitcoin's market cap is the cleanest signal of risk-on rotation into the broader altcoin complex. When ETH/BTC is rising, altcoins typically follow. When ETH/BTC is falling, altcoins typically lag.

L2 and ecosystem tokens follow ETH. Many of the largest altcoins (Solana being an exception) are structurally derivative of Ethereum's performance. Watching ETH/BTC tells you most of what you need to know about likely altcoin cycle position.

The bookmark recommendation. Pull up the live Bitcoin dominance chart on TradingView or CoinMarketCap. Look at it daily for a month. By the end of that month you will have a pattern recognition for what's happening in the broader crypto market that no amount of reading can replace. The chart is one of the most information-dense single visualizations in the entire crypto data landscape.

The pattern that most working analysts use: check Bitcoin price, ETH/BTC ratio, Bitcoin dominance, and total crypto market cap in that order, every day. Five minutes. Builds context. Tells you where the broader market is positioned. The decisions about specific protocols and positions get made on top of this baseline context.