The Monet Blog · Protection

What a non-custodial wallet means, and how to keep yours safe

Self-custody puts you in charge of your own money and your own mistakes. Here is the small set of habits that prevents almost all of the common losses.

By Sankha NagChoudhurySeptember 14, 20266 min read

Custodial means a company holds your assets and can restore your access. Non-custodial means you hold them, through a key only you control. Self-custody removes the risk of a company failing with your money, and adds the risk of you losing the key. Both risks are manageable; only one of them is forgiving.

The recovery phrase is the account

A twelve or twenty-four word recovery phrase generates every key in your wallet. Anyone with the phrase has the funds. Anyone without it, including you, cannot restore the wallet. Treat it as the single most sensitive item you own.

Write it on paper or metal and store it offline, ideally in two separate places.
Never photograph it, type it into a website, or store it in a notes app or password field.
No support agent, charity or platform ever needs it. A request for it is always a scam.

Most losses come from approvals, not from hacking

The common failure is not someone breaking encryption — it is someone persuading you to approve a transaction or a token permission. Read every wallet prompt: it names the contract, the action and the amount.

Reject prompts you did not initiate, even on a site you trust.
Be suspicious of unlimited spending approvals; revoke old ones periodically.
Bookmark the sites you use rather than arriving through search ads or direct messages.

Habits that prevent almost everything

Self-custody security is a short checklist rather than deep expertise. Practised once, these habits cover the overwhelming majority of real-world losses.

Send a small test transfer to every new address before the real amount.
Use a hardware wallet once the balance matters to you.
Keep a separate low-balance wallet for experimenting with new sites.
Check the first and last characters of an address, and the network, every single time.

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