Wallet Hygiene for Operators Who Don’t Want to Be on the News
Basic operational practices that separate operators who’ve held crypto a while from the ones who learn the hard way.
Most crypto losses operators take aren’t from market moves. They’re from operational mistakes, a signing prompt clicked too fast, a phishing site that looked like a wallet, a hardware device sourced from a sketchy reseller. These aren’t sophisticated attacks. They’re hygiene failures. The fixes are unsexy and universal.
The baseline
- Hardware wallets from the manufacturer, only. Never from a marketplace reseller. Never opened. Verify the tamper-evident packaging.
- Seed phrases written on metal, not paper. Stored in two geographically separated places. Never photographed. Never typed into any device.
- Separate hot and cold wallets by function. A trading wallet has small balances and tolerates exposure. A cold storage wallet doesn’t sign transactions for anything you haven’t pre-vetted.
- Multisig for material amounts. A 2-of-3 multisig with one key in cold storage and one key with a trusted institution is materially harder to drain than a single-signature wallet, even a hardware one.
The non-obvious traps
- Blind signing. Some hardware wallets, when interacting with newer contract types, can’t fully decode the transaction and ask the user to “blind sign”, trusting the connected interface. This is the single most common loss vector for sophisticated users.
- Approvals. A single approval transaction can authorize unlimited token transfers to a contract. Many users approve once and forget. Periodically revoke unused approvals.
- Address poisoning. Attackers create wallet addresses that look like ones you’ve sent to before, then dust your wallet with a small transaction. The next time you copy an address from your history, you may be copying theirs.
The operator read
Crypto is operational risk before it’s market risk. If you’re holding meaningful balances, treat your custody setup the way you’d treat a business banking relationship, formal, documented, redundant, and reviewed quarterly. The day you find out you don’t have good hygiene is the wrong day to find out.
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