Phishing defence, the PIN, account hygiene.
The biggest risk on TorZon is a lookalike address, not the market itself, and the withdrawal PIN adds a second layer around your balance.
Copy addresses from a signed source, never type them, and check the header and captcha before you enter a password, every session, because a saved bookmark can point at an address that has rotated out. If a login ever asks for your recovery phrase, close the tab.
Set a unique password and a separate withdrawal PIN, and keep the on-market balance small. The PIN protects the balance from a stolen session, but the surest protection is not leaving much on the market between orders.