The Electrum Wallet is an open source wallet with support for a single currency, that is, there is an electrum wallet for BTC, for ETH, for other currencies but with support for only one of them. Unfortunately we do not yet have this wallet supporting multiple currencies at the same time. But Electrum Wallet for being a free wallet is a wallet that has a good layout, a pleasant and easy to use interface and is still a safe wallet, where you have control of your password and your private key, the user needs to keep the secret words to recover the wallet and also your password to unlock, but this is an option that can be activated or not at the user's discretion. An option for free and low cost wallet.