Bitcoin dominance

The number was close to 100 percent until 2014, collapsed to around 33 percent in January 2018 at the height of the ICO boom, and has spent the years since recovering. Its weakness is the denominator: it changes whenever a listing site adds tokens, and stablecoins now make up a large slice of it. Read it as a rough measure of speculative appetite, not as a price signal.

How it works

Take bitcoin's market capitalization, divide by the total capitalization of all tracked assets, multiply by 100.

The numerator is the reliable part. Bitcoin's supply is verifiable by anyone running a node, and its price comes from deep, continuously traded markets. Nothing about the denominator is that solid.

Start with coverage. CoinMarketCap and CoinGecko each list many thousands of assets, they do not list the same ones, and a provider adding or purging a tranche of tokens moves the percentage without a single trade taking place. TradingView's BTC.D symbol, the chart most traders actually watch, inherits whichever dataset sits behind it.

Then supply. Circulating supply for most tokens is self-reported by the issuing project, and there is no equivalent of a node to check it against. Wrapped assets are double counted by construction: a bitcoin locked in a reserve is counted once as bitcoin and again as the wrapped token issued against it.

Finally, composition. Stablecoins are dollar liabilities rather than speculative bets, and Tether alone reported more than 100 billion dollars of USDT in circulation by 2024. Every dollar of that sits in the denominator, so a wave of people moving into cash inside the crypto system pushes bitcoin dominance down while telling you the opposite of what a falling reading is usually taken to mean. Some charting tools publish a variant with stablecoins excluded for exactly this reason.

Where you see it

Dominance is the number traders quote when arguing about whether an altcoin season has started.

The usual reading is that falling dominance means money rotating out of bitcoin and into everything else. Often that is true, but the ratio has no direction of its own: it falls when altcoins rise faster than bitcoin, and it also rises during crashes when altcoins fall harder. Bitcoin's November 2021 all-time high arrived while dominance was near 40 percent, well below where it had been at the start of that year, so a strong bitcoin price and a weak dominance reading are perfectly compatible.

For someone buying bitcoin rather than trading rotations, it is close to noise. Dominance does not affect your exchange fees, your custody setup, or whether buying is legal where you live. Its one honest use is as a temperature gauge on how much of the market's money is chasing things that are not bitcoin.

Bitcoin dominance vs market capitalization

Bitcoin dominance is a ratio with a denominator someone else defines; market capitalization is an absolute figure for one asset.

The two move independently all the time. Bitcoin's capitalization can double while its dominance falls, because dominance only asks how bitcoin did relative to a basket that keeps changing shape. If you want to know what the market thinks bitcoin is worth, read the capitalization. If you want to know how much speculative money is pointed elsewhere, read the share, and remember that the basket it is measured against is not audited.