Seed Phrase Safety: Where to Keep the 12 Words That Control Your Crypto
5 min read
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5 min read
Picture this. You set up a new crypto wallet. It shows you 12 random words and says "write these down". You snap a photo, because it is quick, and move on.
That photo now sits in your cloud backup. Anyone who reaches it can take everything in the wallet. No password reset. No customer service. No way to undo it.
This post shows how to store a seed phrase safely, in plain steps. It also covers the mistakes people make most.
A seed phrase is a list of words, usually 12 or 24 depending on the wallet. It is also called a recovery phrase.
Think of it as the master key. The wallet app is just a window. The phrase is what actually controls the coins. Whoever holds the words holds the money.
This works in two directions:
So a good plan protects against two things at once: losing the words and leaking the words.
Most losses are boring. They are not movie-style hacks.
You do not need a bunker. You need a few habits.
Write the words yourself, on paper first. Number each one. Then read them back slowly and check each word against the screen. One guide I found warns about look-alike characters such as 1 and I, or 0 and O, so write clearly.
Do this away from cameras. Turn off screen sharing. Do not read the words aloud on a call.
Banxa recommends at least two copies in two separate locations. The reason is simple. One event, like a fire, should not be able to destroy both.
Pick places you trust and can reach. A home safe is one. A relative's home or a bank box is another, if you are comfortable with it.
Paper is fine to start. For an amount that matters to you, many guides suggest moving the words onto a steel or titanium plate. Metal survives fire and water far better than paper.
Before you put real money in, prove the backup works. Restore the wallet from your written words on a fresh device, and check that the same address appears. Banxa suggests doing this while only a small amount is at stake.
This is a real question. If something happens to you, can anyone find your crypto?
There is no perfect answer. Telling a person the words gives them full control now. Telling nobody can mean the money is lost forever if you are gone.
A middle path is to leave written instructions on where a backup is and what it is for, without the words themselves, in a place a trusted person can reach. Keep it simple and review it once a year.
No. If you keep coins on an exchange, the exchange holds the keys. You log in with a password and two-step verification instead.
That is easier, but it is a different risk. You trust the company. Our comparison of exchange vs self-custody crypto risk explains the trade.
If you use self-custody, the seed phrase is your whole security system. Treat it that way.
Storage is only half the job. You also need to know what sits behind those words.
If you hold Bitcoin or other coins in a wallet you control, add them to your NetWort holdings. Seeing the total value in one place helps you judge how much backup effort the wallet deserves.
Open Holdings in NetWort, add each wallet's coins, and write down which wallet each one lives in.