Why Market Cap Isn’t the Same as Money Invested
Market cap looks like a pot of money at first glance. It isn’t. The calculation is useful, but only if you understand what it is actually measuring.
Concept explainer · about a 3-minute readThe calculation is simple
Market capitalisation is usually price multiplied by circulating supply. If one million tokens are counted as circulating and the reference price is £1, the reported market cap is £1 million.
Nobody had to invest £1 million
That £1 million does not mean £1 million of cash entered the token. The last or reference trading price may have been established with a much smaller amount of actual trading. Multiplying that marginal price across the whole circulating supply creates the market-cap figure.
Why selling changes the picture
If many holders try to sell into limited liquidity, the price can fall as the pool or order book absorbs those sales. You cannot normally multiply the current displayed price by every token and assume all of them could be sold for that amount.
What market cap is useful for
Market cap can be a useful scale indicator when compared consistently, but it should be read alongside liquidity, supply methodology, volume and market structure. It is a measurement, not a pile of money waiting to be withdrawn.
A simple example exposes the problem
Suppose a token has one billion tokens in circulation and the latest market price is £0.000001. The arithmetic gives a £1,000 market cap. That does not tell us that buyers have deposited £1,000. A relatively small trade in a thin pool might have been enough to establish that marginal price. The calculation then applies that latest price to the whole circulating supply, including tokens that have never traded at all. Market cap is therefore a valuation shorthand, not a bank balance and not a running total of investment.
Why I stopped asking “how much money is in it?”
When I started looking at GRIFF I naturally wanted one number that told me the size of the project. Market cap looked like that number. Building the pool made the weakness obvious: the amount of SOL actually available in liquidity was a completely different thing. A token can display a market cap much larger than the assets available to absorb sales. For a small token especially, I find it more useful to ask three separate questions: what price is the market quoting, what supply is that price being multiplied by, and how much usable liquidity is actually there?
Seeing GRIFF’s early pool made this click for me. A tiny pool could produce a token price, and that price could be multiplied by a huge supply to create a market-cap number far larger than the actual liquidity available.