What’s the general lifespan of a cold storage device? How long until it should be replaced?
Discussion
As long as they work! Old Trezor Ones and MK2’s still work great in my experience.
Have some free digital energy ⚡
Digital key storage devices should be viewed as convenience mechanisms. Any private keys that are important to you should be stored in analog form, preferably on metal if you plan to use them over the medium or long term. Use a secure BIP39 passphrase if you are concerned about key disclosure, and use a passphrase and multiple keys in a multi-signature wallet if you are concerned about both key disclosure and key loss.
think of them as signing devices