Library · Keeping it safe
What "not your keys, not your coins" actually means
Who legally holds your crypto, why a private key is the whole asset, and how to decide between an exchange and a device you control.
Every exchange account is a promise. You do not hold the coins — the company does, and what you own is an entry in their database saying they owe you. Most days that is a distinction without a difference. It stops being one the moment the company freezes withdrawals, gets hacked, or goes under.
That is what people mean by "not your keys, not your coins." It is not a slogan about ideology. It is a description of who is legally holding the asset.
A private key is the whole thing. A crypto wallet does not contain coins. It contains a key that proves you control an address on a public ledger. Whoever has the key can move the funds — permanently, with no support line to call. This is why the question "who holds the keys?" appears on every listing in our directory, and why it is the first thing worth knowing about any service.
Custody is a trade, not a mistake. Leaving crypto on an exchange buys you convenience and a password reset. Holding your own keys buys you control and hands you the entire risk of losing them. Neither is the responsible choice in the abstract — they are different risks, and the right one depends on how much is at stake and how confident you are about backups.
Where hardware wallets fit. A hardware wallet keeps the key on a small dedicated device that never exposes it to your computer. Transactions are signed on the device and only the signature leaves it. That removes the most common way people lose crypto — malware on a general-purpose machine — and replaces it with a different job: keeping a recovery phrase safe for years.
The recovery phrase is the real asset. The device can be replaced. The twelve or twenty-four words cannot. Written on paper, stored somewhere a fire or a flood or a house move will not reach, and never — under any circumstance — typed into a website. No legitimate service will ever ask you for it. We never will.
If you are choosing a device, the hardware section of our directory lists what each one is good for and what to watch out for.
Where to go next
From our directory. Each entry has a full listing with what it is good for and what to watch out for.
Czech hardware wallet maker; its firmware and hardware designs are open source.
Educational content, not financial advice. We are not a broker, exchange, custodian or adviser, and we never take custody of your assets. We will never ask for a seed phrase or private key. See the full disclaimer.