A cryptocurrency wallet that is built on the Ethereum ERC-20 protocol is called MetaMask. Because of this, some individuals think that MetaMask is exclusive to Ethereum as only ERC-20 tokens are supposed to be held in MetaMask. https://sites.google.com/...etamask-hold-bitcoinA cryptocurrency wallet that is built on the Ethereum ERC-20 protocol is called MetaMask. Because of this, some individuals think that MetaMask is exclusive to Ethereum as only ERC-20 tokens are supposed to be held in MetaMask. See more