Crypto market cap explained: supply, FDV and the cheap-coin trap
Market cap in crypto is the price of one coin multiplied by the number of coins in circulation, so it tells you how big a cryptocurrency is, not how expensive one unit is. It is the standard way to compare projects, but on its own it says nothing about safety or future price. This full guide covers the three kinds of supply, fully diluted valuation, the cheap-coin trap, size categories, dominance, and the ways the number can mislead you.
What is market cap in crypto?
Market cap (market capitalization) is a cryptocurrency's current price multiplied by its circulating supply. If a token trades at 2 dollars and 50 million tokens circulate, its market cap is 100 million dollars.
The figure estimates the market value of all coins that can be traded today. It is calculated from the last trade price, so it changes every time the price or the circulating supply changes.
Market cap is a size measure. It helps you compare one project with another, but it is not the amount of money people have actually put in, and it is not a quality score.
Circulating, total and max supply: what is the difference?
Supply is the second half of the formula, and crypto projects report three different numbers. Mixing them up is the most common reason people misread market cap.
- Circulating supply: coins that are already out and can be traded now. Market cap uses this number.
- Total supply: every coin created so far, including coins locked for the team, investors, a treasury or future rewards.
- Max supply: the hard limit that can ever exist. Bitcoin's is fixed at 21 million; some coins have no max supply at all, and new units keep being issued.
What is fully diluted valuation (FDV)?
Fully diluted valuation (FDV) is the price multiplied by the max supply, or by the total supply when there is no maximum. It shows what the project would be worth at today's price if every coin were already circulating.
When FDV is several times larger than market cap, most coins are still locked and will be released over time through unlock schedules. Each unlock adds new coins to the market, and if buyers do not grow at the same pace, the extra supply can push the price down.
For a coin like bitcoin, where most of the max supply has already been mined, market cap and FDV are close. For many young tokens only a small slice is circulating, so the gap is wide. Always check the unlock schedule a project publishes before reading its market cap as the full picture.
Market cap vs price: the cheap-coin trap
A low price per coin does not make a coin cheap. Price only tells you the cost of one unit; how big the project already is depends on how many units exist.
Take two purely hypothetical coins. Coin A costs 0.01 dollars and has 100,000,000,000 coins in circulation, so its market cap is 1,000,000,000 dollars. Coin B costs 50 dollars with 10,000,000 coins in circulation, so its market cap is 500,000,000 dollars. Coin A looks cheaper per coin, yet the market already values it at twice the size of Coin B.
Now imagine someone says Coin A could reach 1 dollar. With the same supply, its market cap would have to become 100,000,000,000 dollars, a hundred times larger. Before believing a price target, multiply it by the supply and ask whether that total makes sense.
Waletifi itself does not show market cap or FDV. The app's Market tab and the price pages on our site show the live price, the 24-hour change and a line chart, and a price alert can notify you when an asset reaches a price you chose or moves by a set percentage within 24 hours.
Large cap, mid cap and small cap: what do they mean?
Cryptocurrencies are often grouped by market cap into large, mid and small caps. There is no official rule: the dollar thresholds vary between data websites and shift as the whole market grows or shrinks, so read the labels as rough groups.
- Large caps: the biggest and usually oldest networks. They tend to have more liquidity and are harder to move with a single order, but they can still fall sharply.
- Mid caps: established projects that are smaller and usually swing more than large caps.
- Small caps: young or niche tokens. Prices can jump or collapse quickly, trading is often thin, and scams are far more common in this group.
Stablecoin market cap and bitcoin dominance
A stablecoin's market cap is roughly equal to its supply, because each token is designed to stay near 1 dollar. When the market cap of a dollar stablecoin grows, it mostly means more tokens were issued, not that the price went up.
Bitcoin dominance is bitcoin's market cap as a share of the total market cap of all cryptocurrencies. Several crypto data websites publish it, and people use it to see whether money is concentrated in bitcoin or spread across other coins. Because stablecoins are counted in the total, their growth alone can change dominance even when bitcoin's price stays still.
Market cap vs trading volume vs liquidity
Market cap, trading volume and liquidity answer three different questions. Market cap describes size, volume shows how much actually changed hands, and liquidity tells you whether you could buy or sell a meaningful amount near the quoted price.
A coin can have a large market cap but low volume and thin liquidity. In that case the headline number is mostly theoretical, because selling even a modest amount could move the price a lot.
| Metric | What it measures | Formula | What it tells you | Pitfall |
|---|---|---|---|---|
| Market cap | Value of the coins circulating now | Price × circulating supply | How big a project is compared with others | Uses the last trade price, not money invested; easy to inflate with a tiny float |
| Fully diluted valuation (FDV) | Value if every coin existed today | Price × max supply (or total supply) | How much new supply may still come to market | Assumes today's price holds while supply grows |
| Trading volume | Value traded over a period, usually 24 hours | Sum of all trades in the period | How active the market is | Can be inflated by fake or circular trades |
Why market cap can be misleading or manipulated
Market cap is only as honest as its two inputs, and both can be distorted. These are the usual warning signs:
- Low float: when only a small share of supply circulates, a few purchases can push the price, and the market cap, very high.
- Thin liquidity: a big number with little real money behind it cannot be cashed out at that value.
- Self-reported supply: circulating supply comes from the project and is not audited, so it can be wrong or out of date.
- Concentrated holders: if a few wallets hold most coins, one large sale can collapse the price.
- Promoters quoting market cap as proof of quality: a large number is not a guarantee, and pressure to buy fast is a red flag.
Memecoins and market cap
Memecoins often launch with huge supplies, sometimes in the hundreds of billions or more, so each coin costs a fraction of a cent. That tiny price is exactly the cheap-coin trap: the market cap can already be large, and reaching a round price like 1 dollar would require an enormous total value.
Memecoin market caps are also among the easiest to inflate, since many have low liquidity and a few wallets holding a big share. Read them as a measure of hype at that moment, not of value behind the token. This guide does not recommend any coin.
