Session Keys: the one Polymarket feature most traders ignore

Most people sign every trade with their main wallet key. That's like carrying your house deed to the grocery store.

Polymarket's Session Keys exist to solve exactly this: a scoped signer with limited permissions, so your master key stays cold. At Coinbase, account-takeover incidents almost always started the same way — a hot key with too much power, phished once.

Three rules I follow:

1. Trading key != storage key. Never mix them.
2. The key that signs daily trades should hold only what you can afford to lose this week.
3. Hardware wallet for anything long-term. Browser extensions are for convenience, not custody.

None of this is exotic. It's boring hygiene — the kind that saves accounts.

(Full breakdown coming in my next post: how to set up scoped signers step by step.)

Not financial advice. Security is your responsibility.