Watch-Only Wallets
Monitoring a balance without the keys being present. Useful, underused, and it removes a specific risk.
A watch-only wallet tracks addresses without holding the keys. It can show balances and history and cannot spend anything.
Why it is useful
Checking a cold storage balance without touching the device. This is the main use. Retrieving a hardware wallet to see a number is friction that discourages checking, and checking is occasionally legitimate.
Monitoring for unexpected activity. If an address you control receives or sends something you did not initiate, a watch-only view with notifications tells you.
Record keeping. A complete transaction history for addresses you control, without exposing keys.
Sharing visibility. An accountant or a partner can see holdings without any ability to move them.
How to set one up
Most wallets support importing an address, or an extended public key which generates all addresses in an account.
An extended public key reveals every address in that account and cannot spend from any of them. It is the right level of access for monitoring and it does have privacy implications: whoever holds it sees your entire history for that account.
The privacy trade
Importing addresses into a wallet that queries a third-party provider tells that provider which addresses you are watching.
For a watch-only view of cold storage, that links your cold addresses to whatever else the provider knows about you.
Using your own node, or a wallet that supports a custom endpoint, removes that.
What it does not do
It does not protect the keys. If the keys are compromised elsewhere, watching does not help beyond alerting you.
It does not replace the restore test. Watching an address confirms funds are there; it does not confirm you can recover the wallet.
The arrangement we use
A watch-only view of cold storage on a phone, with notifications enabled.
The device stays in a drawer. Checking the balance requires no retrieval, which removes the temptation to plug it in unnecessarily and therefore removes the exposure that comes with that.
Combined with a working balance at the exchange used for the withdrawal test for anything active, the cold storage genuinely does not get touched between quarterly rebalances, which is what it is for.
The recommendation
If you hold cold storage and find yourself retrieving the device to check a number, set up a watch-only view instead.
It takes ten minutes and it converts a habit that creates exposure into one that does not.
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