Paper backups fail in ways metal doesn't, and metal backups fail in ways paper doesn't. What you're actually defending against decides the choice: fire and water, or your own forgetfulness and a lost hiding spot. Most serious holders end up using both, but for different jobs.
What paper and metal each actually protect against
Pick the wrong material and you've spent money on protection that doesn't cover your real risk.
Where paper wins
Paper is cheap, fast, and readable by anyone. You can write a seed phrase on paper in two minutes with a pen you already own. Hand-written duplicates are easy to spread across locations (never photocopy a seed phrase). Paper's weakness is environmental: fire, flood, mold, and a curious houseguest all defeat it, and ink fades over years.
Where metal wins
Stamped or engraved metal survives house fires and floods that destroy paper. Stainless steel plates and washers are the common approach. Metal is heavier, costs more, and takes longer to set up, but it doesn't care about water or heat the way paper does.
The $40 fire that changed one holder's mind
Picture a small kitchen fire in a rented flat, contained fast, no injuries. The tenant had his seed phrase on a folded index card inside a paperback on a shelf. The book survived. The card didn't: the fire was close enough that it curled, and the ink ran under the water the firefighters used. He recovered his funds because a second copy sat at his parents' house. Without that copy, it would've been a very bad week.
Forty dollars of stainless washers and a stamping kit would've made that copy fire-resistant. That's the whole argument for metal in one anecdote.
Paper's hidden failure mode: you
Metal doesn't fix human error, and neither does paper. But paper fails more quietly.
- Misplaced copies. A paper backup you can't find is worse than no backup. It's a liability sitting somewhere you forgot.
- Illegible handwriting. One smudged character in a 12-word phrase makes it unrecoverable. Stamping metal forces you to slow down.
- Casual photography. People photograph paper backups "just in case" and leave the image in a cloud photo library. That's a seed phrase on someone else's server.
Metal plates don't stop you from doing any of that either. The material isn't the security. The discipline around it is.
How to choose, practically
Here's a rough decision table, a starting point rather than gospel.
| Your situation | Paper is fine if… | Metal makes sense if… |
|---|---|---|
| Small holdings, low stakes | You have a safe deposit box or fireproof safe and a second location | Probably overkill |
| Meaningful savings | You're disciplined about duplicates and re-checking them | You want fire and flood resistance without thinking about it |
| Long-term cold storage | Rarely, since paper degrades | Yes. This is the case metal was built for |
Whatever you pick, test it. Recover from your backup once, on a throwaway wallet, before you trust it with real funds. A backup you've never restored from is a guess.
Where MGBX fits in
MGBX is a trading platform, not a backup service. Your seed phrase protects self-custody wallets, not exchange accounts. If you're holding on an exchange, the seed-phrase question is moot. You're trusting the platform's security instead of your own. That's a legitimate choice for active trading, so just don't confuse the two. Know which assets you actually control and back up the ones you do.
Common questions about seed storage
Can I just use a fireproof safe instead of metal plates?
Yes, and it's often cheaper. A decent fireproof safe protects paper backups from most household fires. The catch is that safes have ratings and limits, and a small document safe won't survive a total structural fire the way a stamped steel plate might. If you go the safe route, keep a second copy somewhere else entirely.
Is stamped metal really more secure than paper?
Only against physical threats. Metal beats paper on fire, flood, and general degradation. It doesn't stop you from losing the plate, telling someone where it is, or photographing it. Security comes from your habits, not the material.
What about engraving my seed onto a metal plate at a shop?
Don't. You'd be handing your phrase to a stranger and possibly a camera. Buy a stamping kit and do it yourself, or use a purpose-made backup product you assemble privately at home.
Before you buy anything, grab a pen and write your current backup plan on one sheet of paper: where each copy lives, what protects it, and when you last checked it. If you can't fill in all three columns, that's your next task.