General information, not financial advice. Test any setup with a small amount first. Status 23 October 2026.
Your seed phrase is the master key. Anyone who reads it can take the coins; if it is destroyed and your device fails, the coins are gone. Physical security has two goals that pull in different directions: survive and stay secret.
Survive
- Paper burns and fades. Many people stamp or engrave the words on steel.
- Keep at least two copies in separate places, so one fire or burglary does not take both.
- Check your backup now and then: is it readable, and is it where you think?
Stay secret
- Never photograph the words, type them into a phone or computer, or store them in the cloud or a password manager that syncs online.
- Do not label it "bitcoin seed". A plain envelope draws less attention.
- Anyone who asks for your seed phrase, including "support", is trying to steal.
The problem → Bitcoin's answer
A single copy is a single point of failure, but many copies increase the risk of theft. Bitcoin offers two tools that remove this dilemma:
- A passphrase: a stolen seed without the passphrase opens only an empty or decoy wallet.
- multisig: no single backup can spend on its own. See multisig setup.
Rule of thumb: pick the simplest setup that survives your threat model, and write down how it works for yourself.