Picture the whole crypto market as a single map. Bitcoin dominance (BTC Dominance) is the share of that map Bitcoin's territory covers. The math is simple: Bitcoin's market cap divided by total crypto market cap, as a percentage. Dominance at 60% means that of every 100 dollars in the market, 60 sit in Bitcoin. The other 40 are spread across thousands of other coins (altcoins).
The two ways dominance moves
Dominance doesn't only rise when Bitcoin's price rises. It's a ratio. So what decides it is the relative speed of the numerator (Bitcoin) and the denominator (the whole market).
- Bitcoin rises, alts flat → dominance up
- Bitcoin falls but alts fall harder → dominance up even as prices drop
- Bitcoin rises gently but alts moon → dominance down
So the dominance chart carries info the price chart doesn't. It shows how money is flowing inside the market, and its risk appetite. When money crowds into "relatively proven" Bitcoin, that often reflects defensive psychology. When money spreads out to small, risky alts, that often reflects aggressive greed.
The classic narrative of the cycle
Past bull markets ran a repeating sequence. ① Early in a cycle, Bitcoin runs first and dominance rises. ② While Bitcoin rests near its highs, profits rotate into large alts like Ethereum. ③ Finally even small alts moon in the so-called alt season, and dominance plunges. ④ Once the party ends, alts collapse the hardest and dominance recovers again.
In the late-2017 alt frenzy, dominance dropped into the 30s. Then it climbed back to the 60–70s through the 2018 bear market. A similar rhythm showed up in 2021. That's where the saying "a dominance plunge signals the late stage of the cycle" comes from. But keep in mind: this is a pattern seen across just a couple of cycles. The sample is way too small to call it a statistical law.
How stablecoins changed the reading
Today's dominance reading comes with one caveat. The denominator, "total market cap," includes stablecoins like USDT and USDC. Stablecoins are pegged to a dollar, so they're basically cash on the sidelines. When the market flees risk by selling coins and parking in stablecoins, that alone reshapes the denominator and drags Bitcoin dominance down. So these days many people watch dominance excluding stablecoins. Others watch stablecoin dominance instead, which rises the greater the fear. The same number can mean slightly different things depending on the era.
The trap of long-term comparison, 90% in 2017 vs. 60% now
One more thing. When you look at dominance's long-term chart, remember that the makeup of the denominator keeps changing. Crypto in 2013 was basically Bitcoin plus a handful of alts. Today tens of thousands of tokens enter the count. Every new listing grows the denominator. So dominance carries a structural bias that drifts slowly lower over time. That's why a lazy take like "it was 90% in 2017, only 60% now, so Bitcoin's era is fading" is dangerous. For the same reason, lay supporting indicators next to it, like Ethereum dominance and total altcoin market cap (TOTAL3). Reading the relative flow gives you less distortion.
How to make use of it
You can check dominance easily on TradingView under the BTC.D symbol. It's also in the chart menus of CoinMarketCap and CoinGecko. To say it again: dominance isn't a trade-signal generator. It's closer to narration describing the market's phase. Use it to read one thing. Is the market's energy concentrating in Bitcoin right now, or has risk appetite spread all the way to the edges of alt-land? The Fear & Greed Index shows the temperature of emotion. The long/short ratio shows the lean of positions. Dominance shows the topography of money. For the record, alternative.me's Fear & Greed Index already folds in changes in dominance as one component. So the octopus on this site reads the shadow of dominance indirectly, through that path.
This content is for educational and entertainment purposes and is not investment advice.
