The downside of cold storage is that your assets are be connected to your computer with a USB cable and to go through various protective mobile device, or with Bluetooth.
Your email is safe as long as the password is unknown. You must confirm by touching the green checkmark on your Trezor device. There are a number of cold storage wallets you can buy to get started. This helps support our work, but does not affect what we cover or how, and it does not affect the price you pay. A simple USB storage drive or a sophisticated device with a battery, Bluetooth, and other functions can be used as a hardware wallet.
