3. Stay away from casinos who requires KYC documents.
Some casinos asks for KYC because they have to comply with legislations of the country from where they got their license. Better avoid them if you value your privacy. But doesn't mean they are going to scam you.
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5. Always enable 2 factor authentication.
It may secure your account but won't prevent the casino from scamming you.
I would recommend to stay away from all online Casinos, the houese (owner of the Casino) always wins.
Exchanges always win, mixers always win... Does this mean we should not use them!
I'd add something: if you've been scammed and Game-Protect contacts you, don't give them any money. You'd be on a double-loss! 
If you still get scammed, do not panic, gather all information and send it to game-protect. He will save the world and give your money back while scammers will be in prison forever. (I joke of course).
game-protect's account has been banned.