The host of Altcoin Daily, Aaron Arnold, lists down four competitors of Ethereum that he expects to soar in 2021. Arnold said that as Ethereum (ETH) will grow, some of its rivals will attract interest. The first on his list is Solana (SOL) as they are conquering the market like no other. Polkadot is set to rise and makes it the second competitor of ETH. Third on the list is Cardano (ADA) and the final ETH competitor is Elrond.