You wrote down 12 or 24 words when you set up your wallet. Right now they're probably on a sticky note, in your camera roll, in a notes app, or you aren't quite sure where. Those words are the wallet. Anyone who reads them can move your funds from any device, anywhere, and if you lose them while your device fails, nobody can restore access.
The short answer: ranked from worst to best, the five common options are a photo in cloud storage, a password manager, paper in a home safe, a metal plate in a home safe, and two metal backups kept in two separate locations. Digital copies rank lowest because a stranger on another continent can steal them without ever touching your home. A physical copy can only be stolen by someone standing in the room. Keep the phrase offline, on a material that survives fire, in more than one place.
The phrase itself comes from a standard wordlist of exactly 2,048 words, defined in the BIP-39 specification for mnemonic seed phrases. Wallets for Bitcoin, Ethereum and many other networks use it, which means your words will restore your wallet in any compatible software. That portability is exactly why storage matters so much.
Comparison at a Glance
| Risk | Photo in cloud | Password manager | Paper in safe | Metal in safe | Two metal backups, two places |
|---|---|---|---|---|---|
| Remote hacking | High | Medium | None | None | None |
| Physical theft | Low | Low | Medium | Medium | Low to medium |
| House fire | Survives | Survives | Poor to fair | Good | Very good |
| Flood or water | Survives | Survives | Poor | Good | Very good |
| Single point of failure | Account lockout | Master password loss | Yes | Yes | No |
| Indicative cost | Usually free to roughly $10/month | Usually free to roughly $5/month | Roughly $50–300 for a safe | Roughly $30–150 plus safe | Roughly $60–300 plus second location |
Photo in Cloud Storage
This is the worst option, and it's also one of the most common. Taking a photo feels responsible. It isn't. Phones sync images to cloud accounts automatically, often within seconds, so a single snapshot can end up on your phone, a backup server, a laptop and a shared family album.
Each of those is an attack surface. A phished email password, a reused password leaked from another site, or a SIM swap that intercepts your reset codes can give a thief your full photo library. Some malware is built to scan images for text that looks like seed words. Once the words leave your possession, the theft can happen in minutes and there's no bank to call.
Indicative price: usually free for basic tiers, roughly $1–10 a month for more space.
Who it suits / who should skip it: it suits no one holding a seed phrase. Everyone should skip it, and if you already have such a photo, delete it from the device, the cloud trash folder and any synced computers.
Password Manager
A reputable password manager encrypts its vault, and agencies such as CISA recommend password managers and multi-factor authentication for everyday accounts. That advice is sound for logins. A seed phrase is different: it isn't a login that can be reset, it's the master key to funds that can't be recovered.
The risk is concentrated in one place. If malware on your computer captures the master password, or you approve a fake login prompt, the whole vault, seed included, is exposed. On the other side, forget the master password and lose your recovery kit, and the phrase is gone too. It ranks above a cloud photo because it's encrypted, but it's still online and still reachable remotely.
Indicative price: usually free to roughly $3–5 a month for individual plans.
Who it suits / who should skip it: it may suit someone with a very small test wallet they'd accept losing. Anyone storing meaningful value should skip it for the seed and keep the manager for passwords.
Paper in a Home Safe
Now you're offline, which removes the remote attacker entirely. That's the single biggest jump in this ranking. Bitcoin.org's wallet security guidance also stresses offline backups for exactly this reason.
Paper has physical limits. It ignites at roughly 230°C, ink fades, and a burst pipe can turn it to pulp. A fire-rated safe helps: common ratings promise to keep the interior below about 177°C for 30 to 60 minutes. Many house fires burn longer or hotter than that, and a cheap lockbox with no fire rating offers little protection. Burglars also target small safes because they can carry them away.
Indicative price: roughly $50–300 for a fire-rated home safe; the paper costs nothing.
Who it suits / who should skip it: it suits beginners as a starting point while they arrange something better. Skip it as a long-term plan if you live somewhere prone to floods or fires.
Metal Plate in a Home Safe
Stamping or engraving the words into stainless steel or titanium solves most of paper's weaknesses. Stainless steel melts at roughly 1,400–1,500°C, far above typical house fire temperatures, and it doesn't care about water. Products range from tile-based plates to blank plates you punch with a letter stamp set.
Under the BIP-39 standard, the first four letters of each word are enough to identify it, so many plates only hold four characters per word. That saves space and stamping time, usually 30 to 60 minutes for 24 words. The remaining weakness is that there's still only one copy in one place. A burglar who takes the safe, or a single disaster, can end it.
Indicative price: roughly $30–150 for the plate, plus the safe.
Who it suits / who should skip it: it suits most people holding a modest amount who want a durable, simple setup. Skip it as your only copy if the amount would be painful to lose.
Split Metal Backups in Two Locations
The best common setup is two complete metal backups of the same phrase, stored in two separate places, such as a home safe and a trusted relative's home or a safe deposit box. A fire, flood or burglary at one site no longer destroys your only copy.
Two copies mean two places to protect, so add a passphrase (sometimes called the 25th word) if your wallet supports it. Store the passphrase separately from both plates. Then a thief who finds one plate still can't open the wallet. Note that losing the passphrase locks you out as surely as losing the words, so it needs its own backup.
Indicative price: roughly $60–300 for two plates, plus usually $50–200 a year if you rent a safe deposit box; costs vary by region.
Who it suits / who should skip it: it suits anyone holding an amount they couldn't afford to lose. Skip it only if you can't trust any second location yet; in that case, use one metal plate until you can.
Common Mistakes
- Cutting the phrase in half. Putting words 1–12 in one place and 13–24 in another sounds clever, but whoever finds one half has to guess far fewer words, and losing either half destroys the backup. Store full copies, or use a scheme your wallet officially supports.
- Never checking the backup. Compare every word against the device's display, one by one, before you store it. A single misspelled or swapped word can make the phrase useless, and you'll only discover it when you need it.
- Labelling it or storing it with the device. Don't write "crypto seed" on the envelope, and don't keep the plate in the same box as your hardware wallet and its PIN. Also: no legitimate support agent, wallet maker or app will ever ask for your words. If someone does, it's a scam; report it to the FBI's Internet Crime Complaint Center or your national equivalent.
Verdict
Move your phrase off every digital device today. Then work up the ranking: paper in a fire-rated safe as a temporary step, a metal plate as your baseline, and two full metal copies in two locations, protected by a separately stored passphrase, once the amount justifies it. If your holdings are large or you're planning inheritance, speak to a qualified estate planning professional about how heirs would access the backups, without ever showing them the words themselves.
This article is general security information, not financial or investment advice. Never share your seed phrase with anyone, for any reason.
I'm an Italian creator who builds apps, games and websites. I run Crypto Radar Daily with the help of AI tools: every article starts from the sources linked above, and I check what goes out. I'm not a doctor, a lawyer or a financial adviser. Spotted a mistake or have an idea? Write to me.
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