Every way people store a seed phrase, with the trade-offs: paper, digital copies, metal plates in private locations, Shamir shares and multisig. Choose for the amount you hold and the disasters you expect.
Why is a seed phrase in cloud storage the most common way large sums are lost?
What does a BIP 39 passphrase do?
When does the lesson say metal becomes worth it?
How many copies of your seed exist right now, in any form, including photos and files you may have forgotten?
Then prove it: a 4-question quiz · a challenge. The lesson marks itself complete at 100%.
After this lesson you can: choose a storage method for your seed with its failure modes written down, and know which upgrades are worth it as the amount grows.
Why this lesson exists
Roughly a fifth of all bitcoin is thought to be lost for good, mostly through lost keys.
Roughly a fifth of all bitcoin is estimated lost, mostly through lost keys. A signer can be replaced; the seed cannot. Whatever you decide here is your bitcoin.
The options, honestly
Method
Protects against
Fails when
Cost and effort
Paper, written clearly
nothing digital can reach it
fire, flood, fading, a tidy relative, a single location
pennies; ten minutes
Photo or file in the cloud
losing the paper
any breach of that account, any malware on any device logged in; silent theft from anywhere
free; the most common way large sums vanish
File on your computer
losing the paper
malware that reads files, a stolen or dead laptop
free; nearly as risky as cloud
Metal plate (stamped steel or titanium)
fire, water, time
theft if found; a single location
$20–$100; an hour
Two metal plates, two private locations
all of the above plus a single disaster
both locations compromised; forgetting where
two plates; a trusted second site
Passphrase (BIP 39 "25th word")
a found backup being enough
forgetting the passphrase: the seed then opens an empty wallet
free; a new way to lose everything
Shamir shares (SLIP-39), e.g. any 3 of 5
one or two shares lost or stolen
the scheme being misunderstood by heirs; software support varies
several plates; real complexity
Multisig (lesson 8)
any single key lost or stolen
losing the wallet descriptor; complexity
three devices; the most to maintain
What to do, by amount
Tick means the words survive that threat. Nothing digital survives a remote hack.
Learning money: paper, two copies, verified by restore. Never digital.
Savings you would mind losing: one metal plate in a private place you control (a safe at home, a safe deposit box, a sealed container at a trusted relative's). Verify by restore first.
Savings you cannot afford to lose: two plates in two locations, or multisig with each seed on its own plate, plus the inheritance plan from lesson 12.
Unbreakable SEEDOR: The ULTIMATE Solid Steel Bitcoin Seed Backup · BTC SessionsWatch on YouTube ↗
Steps for any of them
Two power tools, each with a new way to lose everything.
How to Protect Your Bitcoin Before It's Too Late (Essential Security Tips) · Andrei JikhWatch on YouTube ↗
MINI CHALLENGECount your copies
How many copies of your seed exist right now, in any form, including photos and files you may have forgotten?
copies
Be honest; include the ones that should not exist.
If any of them is digital, that is the first thing to fix today.
01Restore a wallet from it and confirm the same addressesOnly a restore proves the words work.
02Because any breach of the account or malware on any logged-in device can read it, silently, from anywhereDigital copies are reachable from anywhere; paper and metal are not.
03It adds a word you memorise; without it the seed opens an empty walletA passphrase is a 13th or 25th word that changes every derived key, and a new way to lose everything.
04Once the amount is more than you would be comfortable losing to a fire or a floodThe question is what a disaster would cost you, not a fixed number.
