Key Takeaways
- Market capitalization equals a coin's current price multiplied by its circulating supply.
- Market cap is a better way to compare coins than price alone, which depends on how many tokens exist.
- Fully diluted valuation (FDV) shows what market cap would be if every future token were already in circulation.
- Market cap doesn't measure how much money is actually invested or how easily a coin can be sold.
When you browse crypto price sites, coins are ranked by market capitalization, usually shortened to market cap. It's the single most common way to judge how big a cryptocurrency is. This guide explains how market cap is calculated, how to use it and where it can mislead you.
What is market cap?
Market capitalization is the total value of all the coins currently in circulation, measured at today's price:
Market cap = current price × circulating supply
For example, a coin trading at $2 with 500 million coins in circulation has a market cap of $1 billion. If the price rises to $3, the market cap becomes $1.5 billion.
Why price alone is misleading
A low price doesn't make a coin cheap. A token priced at $0.01 might have hundreds of billions of units in circulation, giving it a larger market cap than a coin priced at $100. Asking whether a $0.01 token can reach $1 really means asking whether its market cap can grow 100-fold, which may require it to become worth more than many of the world's largest companies. Market cap lets you compare coins on equal terms.
Circulating, total and max supply
- Circulating supply: coins currently available to trade. This is what market cap uses.
- Total supply: all coins created so far, including those locked or held by the team or foundation.
- Max supply: the most that can ever exist, if there is a limit. Bitcoin's max supply is 21 million; Ethereum has no hard cap.
Fully diluted valuation (FDV)
Fully diluted valuation multiplies the current price by the maximum or total supply instead of the circulating supply. It shows what the market cap would be if every future token were already unlocked.
A large gap between market cap and FDV is a warning sign worth investigating. It means many tokens are still due to be released to early investors, the team or the community. As those tokens unlock and are sold, they can put heavy pressure on the price. Always check a project's token unlock schedule before buying.
Large-cap, mid-cap and small-cap coins
There's no official definition, but investors commonly group coins like this:
- Large-cap (above about $10 billion): established assets such as Bitcoin and Ethereum. Generally more liquid and less volatile than smaller coins.
- Mid-cap (about $1 billion to $10 billion): recognized projects with room to grow but more risk.
- Small-cap (below about $1 billion): higher potential upside and much higher risk, including the risk of going to zero.
Total market cap and Bitcoin dominance
Adding up every coin's market cap gives the total crypto market cap, a quick gauge of the market's overall direction. Bitcoin dominance is Bitcoin's share of that total. Rising dominance often signals investors favoring Bitcoin during uncertain periods, while falling dominance can indicate money moving into altcoins. Our guide to crypto market cycles explains how these shifts tend to play out.
Limits of market cap
- It isn't money invested. A coin's market cap can jump by millions on a small amount of buying if few coins are actually trading.
- Liquidity matters. Check 24-hour trading volume and order-book depth. A coin with a large market cap but thin volume may be hard to sell without moving the price.
- Supply data can be wrong. Lost coins, locked tokens and inaccurate reporting can distort figures.
- Stablecoins skew totals. Large stablecoins count toward total market cap even though they're designed not to grow in price.
How to use market cap when researching a coin
- Compare market cap rather than unit price between similar projects.
- Check the gap between market cap and FDV, and look up the unlock schedule.
- Look at trading volume relative to market cap to judge liquidity.
- Combine it with fundamentals such as usage, revenue, developer activity and on-chain data.
Frequently asked questions
Is a higher market cap better?
A higher market cap usually means a more established, liquid asset with lower volatility, but it also means less room for explosive growth. Smaller coins can grow faster but are far more likely to fail.
What is the difference between market cap and volume?
Market cap is the total value of circulating coins. Volume is how much of the coin traded during a period, usually 24 hours. Volume tells you how actively and easily the coin can be bought and sold.
Can a coin's market cap be manipulated?
Yes, particularly for small coins with low liquidity or a large share of supply held by insiders. Thin trading can push prices, and therefore market cap, up or down sharply.
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This guide is for educational purposes only and is not financial advice.
This content is for educational purposes only and is not financial advice. Cryptocurrency investments are volatile and risky. Some links may be affiliate links — see our disclosure.