In one sentence
The total value of all units of a cryptocurrency in circulation, calculated by multiplying the current price by the circulating supply.
Market cap, or market capitalization, of a cryptocurrency is the total value of all units in circulation, calculated by multiplying the current price by the circulating supply.
It’s the metric that ranks the crypto market from largest to smallest, and the first column you see on any ranking list. It’s useful for sizing up how big an asset is in a way unit price can’t, because a 0.10-dollar token with trillions of units in circulation can be worth, in total, far more than a 500-dollar token with only a few.
How market cap is calculated
The formula is price per unit multiplied by units in circulation. If a cryptocurrency trades at 20 dollars and 100 million units are in circulation, its market cap is 2 billion. The important nuance is in the supply, since many projects have locked tokens that will be released over time. That’s why “fully diluted valuation” (FDV) exists, which calculates value using the maximum future supply, and comparing both numbers reveals how much dilution is on the way.
What market cap is useful for (and what it isn’t)
It’s useful for ranking assets by size and estimating their risk profile, because high-cap cryptocurrencies tend to be more liquid and harder to manipulate, while small-cap ones swing violently in both directions. What market cap doesn’t measure is quality or the real money invested, and a low-liquidity token can display a huge market cap that would evaporate if anyone actually tried to sell in size. It’s a snapshot of price, not a certificate of value.
