+ 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. And it is true, hence, you cannot use the MetaMask wallet to store Bitcoin or any other cryptocurrency asset which is not based on the ERC-20 protocol. If the coin is built on the ERC-20 protocol, you can store it securely with MetaMask. If you want to store a non-ERC-20 token, you must first exchange it for an ERC-20 token before putting it in your MetaMask wallet. Can MetaMask hold Bitcoin 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. And it is true, hence, you cannot use the MetaMask wallet to store Bitcoin or any other cryptocurrency asset which is not based on the ERC-20 protocol. If the coin is built on the ERC-20 protocol, you can store it securely with MetaMask. If you want to store a non-ERC-20 token, you must first exchange it for an ERC-20 token before putting it in your MetaMask wallet. Can MetaMask hold Bitcoin