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Why do I need ETH to Send digital assets that aren’t ETH?

Coins that are issued on the Ethereum blockchain are called ‘ERC-20’ tokens, including ETH, SHIB, USDC & USDT. ERC-20 tokens require Ethereum (ETH) to pay for the outgoing mining fees on the Ethereum blockchain. You will need ETH in your wallet to cover the network fees for sending ERC-20 coins. You can either send ETH to your RockWallet to cover these fees or purchase ETH using the ‘Buy’ functionality with a debit card, credit card, or ACH electronic bank transfer (in supported countries/territories).