What is bitcoin dominance? The number everyone quotes and nobody checks

Bitcoin dominance is bitcoin's market capitalisation expressed as a percentage of the market capitalisation of all cryptocurrencies added together. On 20 October 2026 it stood at 59.59 per cent, against a total crypto market capitalisation of about $2.74 trillion. It is the most quoted number in crypto after the price, and it is built on a denominator that almost nobody examines.

How is bitcoin dominance calculated?

Two numbers and one division.

Bitcoin's market capitalisation is its price multiplied by its circulating supply. On the same day, that was roughly $81,400 across 20,098,843 bitcoin, giving about $1.64 trillion.

The total market capitalisation is the same calculation performed for every listed cryptocurrency and added up. The data provider used here counted 22,396 active cryptocurrencies across 1,509 markets, totalling about $2.74 trillion.

Divide the first by the second and you get the dominance figure. That is the whole method, and every quirk in the number comes from the denominator.

What did the rest of the market look like on the same day?

The shares beneath bitcoin, from the same reading on 20 October 2026:

Ether at 10.60 per cent. Tether at 6.66 per cent. BNB at 3.49 per cent. XRP at 2.97 per cent. USD Coin at 2.62 per cent. Solana at 2.23 per cent. Tron at 1.15 per cent.

Everything else, which is the other 22,000-odd assets, shares what is left.

What is wrong with the denominator?

Three things, and the first is the one that changes how you should read the number.

Stablecoins are counted as part of the crypto market. Tether and USD Coin alone accounted for 9.28 per cent of the total on that reading. They are tokens designed to hold a value of one dollar, so they do not rise or fall with the market at all.

That has a direct effect on dominance. When traders sell altcoins for stablecoins, the altcoin market capitalisation falls and the stablecoin market capitalisation rises by a similar amount, so the denominator barely moves while bitcoin's share does. And when new stablecoins are minted because money is arriving, the denominator grows and bitcoin's dominance falls, even though nothing has happened to bitcoin or to any altcoin. Our explainer on how stablecoins hold their peg covers why their supply moves the way it does.

Second, circulating supply is not a standardised figure. It is meant to exclude tokens that are locked, unissued or held by the founding team, and different providers make different judgements about what counts. A project that unlocks a tranche of tokens adds market capitalisation without anyone buying anything.

Third, most of the 22,396 assets barely trade. A thinly traded token with a large nominal supply can carry a market capitalisation that no seller could ever realise. Adding thousands of those together produces a denominator that is a sum of theoretical values, not of money.

Does bitcoin's own market capitalisation have the same problem?

Less of one, but it is not clean either.

Bitcoin's circulating supply is unambiguous, because the issuance schedule is in the protocol and anyone can count the coins on the blockchain. There is no team allocation and no unlock schedule. That is a real advantage over almost every other entry in the list, and it follows from the fixed supply schedule.

The complication is the other direction. A meaningful quantity of bitcoin has not moved in more than a decade, including coins mined in the earliest blocks and coins in wallets whose keys are gone. Those are counted in the supply and therefore in the market capitalisation, even though they can never be sold. Nobody knows the exact figure, which is why nobody adjusts for it.

Is market capitalisation even the right measure?

It is the one everybody uses, and it answers a narrower question than people assume.

Market capitalisation is price multiplied by supply. It is not the amount of money that has gone into an asset, and it is not the amount that could come out. A token whose last trade was for a few thousand dollars can carry a nine-figure market capitalisation if its supply is large enough, because the calculation multiplies the whole supply by that last price.

For bitcoin this matters less, because the market is deep enough that the price reflects real two-way trading at size. For the long tail of the 22,396 listed assets it matters enormously, and those assets are in the denominator of the dominance ratio.

An alternative some analysts prefer is realised capitalisation, which values each coin at the price it last moved rather than at today's price. It produces a much lower figure for assets with large dormant holdings. No mainstream dominance figure uses it, which is worth knowing when you see one quoted to two decimal places.

What is dominance actually used for?

Three uses, in descending order of defensibility.

As a description, it is sound. Saying that bitcoin is about 60 per cent of the quoted value of the crypto market is a reasonable summary of where the money sits, with the stablecoin caveat attached.

As a risk measure, it is informative. A falling dominance generally means capital is spreading into smaller, less liquid assets, which is a riskier configuration whatever anyone thinks about the prices. A rising dominance often means the opposite.

As a trading signal, it is weak. The "altcoin season" theory, which says falling dominance predicts broad altcoin gains, treats the ratio as leading rather than lagging. In practice dominance is a result of price moves that already happened, which is also true of any ratio of two market capitalisations. We have looked at what ether does differently as an actual question about an asset, which is a better frame than reading a ratio.

Why does dominance fall when nothing bad happens to bitcoin?

Because it is a share, not a value. Bitcoin's dominance can fall on a day when its price rises, if the rest of the market rises faster. It can also fall on a day when nothing trades at all, if a large token unlocks new supply or a stablecoin issuer mints several billion dollars of new tokens.

This is the single most common misreading of the figure. A drop in dominance is not evidence that bitcoin weakened. It is evidence that bitcoin's share of a changing total got smaller, and the total changes for reasons that have nothing to do with bitcoin.

Has bitcoin dominance always been this high?

No, and the history explains why people watch it.

In bitcoin's early years it was effectively the entire market, because there was almost nothing else listed. As thousands of other assets launched, the denominator grew enormously and bitcoin's share fell, reaching its lowest points during periods of intense new issuance.

The direction of travel in those periods was mostly a function of how many new assets existed and how aggressively they were valued, rather than a referendum on bitcoin. A market with 22,000 listed assets will always show a lower bitcoin share than a market with 200, regardless of where any price goes.

How do I check the figure myself?

Any major data provider publishes it, and they will differ slightly, because each one makes its own decisions about which assets to include and how to treat circulating supply.

If you want to compute it, the honest version takes two steps. Take bitcoin's market capitalisation. Then take the total and subtract the stablecoins, because they are dollar balances rather than market exposure. Dividing by that smaller denominator gives you bitcoin's share of the part of the market that actually moves with prices, which is usually a higher number and a more useful one.

Whichever version you use, quote the date and the source alongside it. A dominance figure without a timestamp is not a fact about anything.

The honest summary

Bitcoin dominance is a real measurement of a questionable quantity. The numerator is the cleanest market capitalisation in the asset class. The denominator is a sum that includes dollar tokens that cannot move, thousands of assets that cannot be sold at their quoted value, and supply figures set by inconsistent rules.

Used as a description of where value sits, it is fine. Used as a prediction, it is a ratio being asked to do a job it cannot do.

This article explains a metric and is not investment advice.