What’s the difference between market cap and FDV?
Circulating market cap equals the current price multiplied by the number of tokens in circulation. Newly launched projects often have only a small portion of their tokens in circulation, so their circulating market cap may look low while their FDV can be several times higher.
FDV is just a reference figure calculated using the current price. To see the actual release schedule, you need to check the vesting schedule.
$BTC has a maximum supply of 21 million coins, and most of them have already been mined, so its market cap and FDV are not far apart. The current price is 83372.