What Is the Number One Rule of Crypto? Never Share Your Seed Phrase

The number one rule of crypto is short: never share your seed phrase, and never type it into anything except the wallet that gave it to you. Those twelve or twenty-four words are not a password to your account — they are the account. Anyone who reads them can rebuild your wallet on their own phone and empty it in seconds, from anywhere, and there is nothing you or anyone else can do afterwards.

Why is a seed phrase different from a password?

A password protects a company's copy of your money. Lose it and support resets it; steal it and the bank can freeze the account. A seed phrase is different because there is no company in the middle. It is the key to a safe that sits in public, and whoever holds the key owns what is inside. MetaMask cannot reverse a theft, Ledger cannot either, and no helpline exists that can. Treat it like the deed to a house that transfers on sight: show someone a photo of it and the house is theirs.

Who actually asks for it?

Only thieves. Real support staff never ask, so the request itself is the alarm, whatever logo sits beside it. The usual approaches:

• Fake support. Someone friendly replies to your public complaint on X, Discord or Telegram and offers to "validate" your wallet.
• Fake wallet sites. A search advert for MetaMask leading to a page that asks you to import your recovery words.
• Fake airdrops. Free tokens waiting, if you just confirm the phrase first.

Where should it live instead?

On paper, or stamped into metal, somewhere only you can reach, ideally in two places in case of fire or flood. Never in a photo, a screenshot, a notes app or an email to yourself. Anything that touches the internet can be read by someone who is not you.

One habit worth building today: if a message, a person or a website ever asks for your recovery words, the answer is no, with no exception worth thinking about. And if you have already typed them somewhere you cannot fully vouch for, move the coins to a fresh wallet now — an exposed phrase does not become safer with time. A hardware wallet keeps the phrase off your computer for good.