Crypto Marketcap depends on the price and circulation of cryptocurrencies and tokens, but their relative position is relatively stable. The 10 best cryptos by market cap in US dollars per July 21, 2021, are: Bitcoin: $ 578.1 billion Ether: $ 218.3 billion Reb: $ 62 billion Binance Coin: $ 47.1 billion Cardano: $ 36.1 billion Currency: $ 26.8 billion Ripples: $ 25.2 billion Dogecoin: $ 23.6 billion Hexadecimal: $ 22.9 billion Polka dots: $ 11.3 billion