Hardware wallets do solve that problem. Keep your 24-word passphrase somewhere safe, and you can use that to restore your keys into any hardware wallet, without

Hardware wallets do solve that problem. Keep your 24-word passphrase somewhere safe, and you can use that to restore your keys into any hardware wallet, without plugging it in to a computer. The passphrase algorithm is a public standard, so if your hardware breaks, you can restore onto another one. After that, plug the hardware wallet into a computer and you can transfer without the computer ever seeing your private key. The hardware wallet displays the destination address, which you should check. I do agree that Coinbase is reasonably safe, as long as you use a strong password and 2FA, and don't give them your phone number.