Bitcoin (BTC)Ethereum (ETH)Avalanche (AVAX)copyright (BNB, BSC)Solana (SOL)These will be the leading five cryptocurrencies once the curtain closes on 2021.aSection one: IntroductionPreviously, the best cryptocurrency was bitcoin, which was introduced in 2009. BTC was the very first and still is the biggest cryptocurrency on the planet. Cryptocurren