Market cap, short for market capitalisation, is a token's price multiplied by its circulating supply. As a measure of size it is the standard, and it drives how exchanges rank thousands of tokens. Total crypto market cap sat near $3.1 trillion at the end of 2025, against roughly $16 trillion for gold and $50 trillion for the S&P 500.
The calculation
Price multiplied by circulating supply. That is the whole formula.
Trading at $2 with 500 million coins in circulation gives a $1 billion market cap. Straightforward arithmetic, and the simplicity is exactly where problems start.
Three different supply figures
Here is the distinction causing most misreadings.
| Measure | Uses which supply | What it tells you |
|---|---|---|
| Market cap | Circulating supply | Value of coins actually available now |
| Fully diluted valuation (FDV) | Maximum supply | Value if every coin that will ever exist were circulating today |
| Total supply | All minted coins, including locked | Sits between the two |
For newer tokens, the gap between market cap and FDV matters enormously. With 10% of supply circulating, a project carries an FDV ten times its market cap, and the remaining 90% arrives on a published schedule. Checking that schedule against the gap tells you how much future selling is contractually guaranteed.
What market cap is genuinely useful for
- Comparing scale across assets with wildly different unit prices. A $0.00001 token and a $90,000 coin are not comparable on price alone.
- Understanding risk tier. Large caps behave differently from small caps in both directions, and volatility rises reliably as market cap falls.
- Tracking dominance. Bitcoin dominance is Bitcoin's market cap as a share of the total, and it is the standard gauge of where capital is concentrated.
- Index construction. Most crypto indices weight by market cap.
The four things it gets wrong
It is not money invested. Here is the most common misunderstanding. A $1 billion market cap does not mean $1 billion entered the asset. Set by the last trade, price multiplied across all supply produces a number nobody could realise. On a thin enough book, a token gains hundreds of millions in market cap on a few thousand dollars of buying.
It ignores liquidity entirely. Two tokens with identical market caps can have completely different exit conditions. Compare daily trading volume against market cap: very low turnover on a large valuation means the number describes something unrealisable.
Circulating supply is self-reported and inconsistent. On locked tokens, team allocations, and provably lost coins, different providers apply different rules. Bitcoin's figure includes an estimated 3 to 4 million coins in wallets whose keys no longer exist.
It says nothing about quality. With no product and no users, a token can still carry a larger market cap than one with both. Frequently it does.
How to read a market cap properly
Three checks take a minute and change everything.
Compare volume to market cap. Well below 1% daily suggests the valuation rests on very little actual trading.
Compare market cap to FDV. A large gap means substantial future supply. The unlock schedule tells you when.
Check holder concentration on a block explorer. Concentrated supply means very few participants set that price.
Market cap tiers
No official definition exists. These bands are the working convention.
| Tier | Rough range | Characteristics |
|---|---|---|
| Large cap | Above $10 billion | Deep liquidity, wide exchange access, lower relative volatility |
| Mid cap | $1 billion to $10 billion | Reasonable liquidity, higher swings |
| Small cap | $100 million to $1 billion | Thin books, sharp moves, real project risk |
| Micro cap | Below $100 million | Frequently untradeable at scale, highest failure rate |
Track this on mb.io
Market cap is context. Whether you can actually transact at scale is a property of where you trade.
mb.io is a regulated crypto spot exchange backed by MultiBank Group, a financial institution founded in 2005 that serves more than 2 million clients across 100+ countries.
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Frequently asked questions
How is crypto market cap calculated?
Price multiplied by circulating supply. A token at $2 with 500 million coins circulating carries a $1 billion market cap.
Does market cap mean money invested?
No, and this is the most common misreading. Price comes from the last trade, and multiplying it across all supply produces a figure nobody could realise. Thin markets can gain large market cap on very little buying.
What is the difference between market cap and FDV?
Market cap uses circulating supply. Fully diluted valuation uses maximum supply, showing what the asset would be worth if every coin that will ever exist were trading today.
Why do different sites show different market caps?
Because circulating supply is self-reported and providers apply different rules to locked tokens, team allocations, and provably lost coins.
Is a higher market cap safer?
Larger assets carry deeper liquidity and lower relative volatility, which reduces certain risks. It says nothing about whether the project works or whether the price reflects anything.
What is a good market cap to volume ratio?
There is no threshold, and the comparison is what matters. Daily volume well below 1% of market cap suggests the valuation rests on very little actual trading, which affects your ability to exit.
What is Bitcoin dominance?
Bitcoin's market cap expressed as a percentage of total crypto market cap. It is the standard measure of whether capital is concentrating in Bitcoin or rotating into altcoins.
Can market cap be manipulated?
Indirectly, yes. Because the figure derives from the last traded price, a small amount of buying on a thin book can inflate a market cap substantially without meaningful capital entering.
