The Vibe: The amount of coins that are actually out there and available for people to buy, sell, or trade right now.
The Details: Circulating supply counts only the coins that have been released, mined, or unlocked and are in people’s wallets—not the ones still locked up, reserved for teams, or waiting to be created later. Market cap (the total value of a coin) is always calculated using circulating supply × current price, so it’s the real-world size people look at. A low circulating supply with a high total/max supply can mean more coins coming later (possible dilution).
Pro Tip: Always check circulating supply on sites like CoinMarketCap or CoinGecko—don’t trust a project’s own numbers blindly. Sudden big increases can drop the price if demand doesn’t grow too.