Better than a paper backup because its much more difficult to lose information on steel plates. The primary risk with this is that someone steals one of your backups and manages to discover or brute force your password (which is why a strong password is neccessary). A secondary risk with this setup is that if all your backups are lost or stolen in the time between when you verify them and you lose access to your primary wallet, your bitcoin will be lost.
Variable Parameters:
- 1 seed
- 2 or more ~$30 Steel backup plate
- Frequency of backup verification
- Buy 2 or more metal backups.
- Stamp seed on all backup plates.
- Verify that all backups are still in your posession regularly (eg once a year).
The following lists the best known metal backup options:
- Blockplate
- Steelwallet
See James Lopp's Seed Storage Stress Test for more info.
- Its recommended to use punched metal backups like the Blockplate or Steelwallet.