FDV vs Market Cap: Why a Token's Real Size Is Bigger Than You Think

What market cap actually measures

Market cap is the number everyone quotes, and it’s the simplest one to compute: today’s price times the supply that’s currently circulating. It’s a useful snapshot of how big a project is right now — the figure that lets you stack Bitcoin against Ethereum against some week-old altcoin on the same scale.

But there’s a catch baked into the definition. Market cap only counts tokens that exist and trade today. Anything locked in a vesting contract, reserved for the team, promised to early investors, or simply not yet minted is invisible to it. For a mature asset with most of its supply already out, that blind spot barely matters. For a young token, it can hide most of the story.

Where fully diluted valuation comes in

Fully diluted valuation — FDV — runs the same multiplication with a bigger input. Instead of circulating supply, it uses the maximum supply: every token that will ever exist, valued at today’s price. When only a slice of a token’s supply has unlocked, its FDV can tower over its market cap.

The contrast between two well-known assets makes the point. Bitcoin’s supply is capped at twenty-one million coins, and almost all of them are already mined — so its market cap and FDV sit close together, with little supply left to come. A brand-new project that launched with most of its tokens locked up for the team and early backers is the opposite case: a small circulating slice, a mountain of supply still scheduled to arrive, and an FDV that dwarfs the market cap.

The gap is the real story

The space between market cap and FDV isn’t a measure of hidden upside. It’s a map of tokens that are coming — supply already promised to insiders, investors, and emissions schedules, sitting behind a vesting clock. When that clock hits, the tokens unlock and begin landing on the market. If demand doesn’t grow fast enough to absorb them, the new supply weighs on price.

That makes the size of the gap a risk signal you can read at a glance. A small gap means most of the supply is already circulating and there’s limited dilution ahead. A gap of ten to one means roughly nine times the current supply is still waiting in the wings — a lot of future selling pressure that today’s price hasn’t had to digest yet. None of that guarantees a token falls; strong demand can absorb unlocks. But it tells you what the price is up against.

The “low float, high FDV” trap

This is the mechanism behind an entire style of token launch, and it’s worth learning to spot. A project debuts with only a sliver of its supply circulating — sometimes a tenth or less. The small float keeps the market cap modest and approachable, the kind of number that reads as “still early, still cheap.” Meanwhile the FDV quietly sits ten or twenty times higher, because the rest of the supply is locked above current holders, scheduled to unlock over months or years.

The headline market cap tells one story; the FDV tells the real one. Buying near launch on the strength of a small market cap can mean buying into a token whose supply is set to multiply — diluting your position every time a tranche unlocks. Once you start checking the FDV-to-market-cap ratio, you see this pattern everywhere.