The Vibe: The total dollar value of a cryptocurrency — a quick way to see how big or small a coin really is.
The Details: Market cap is calculated as: Current Price × Circulating Supply. Example: If a coin trades at $10 and has 100 million coins circulating, market cap = $1 billion. It shows real-world size and liquidity better than total/max supply (which includes unreleased/locked coins). Higher market cap usually means more stability, better liquidity, and institutional interest — but also slower growth. Low-cap coins (<$100M) can explode (10x–100x) but are riskier (rugs, dumps). In 2026, Bitcoin dominates with ~$2T+ market cap, Ethereum ~$500B+, and top alts vary widely.
Pro Tip: Always use circulating supply for market cap (not total supply) — check CoinMarketCap or CoinGecko. Compare market caps to judge relative size/risk. Don’t chase only low-cap “moonshots” — balance with high-cap safety (BTC/ETH).