(2) Avoid suspicious links: Be cautious when clicking on links, especially if they seems too good to be true or from an unknown sources.
(4) Beware of fake giveaway.
(5) Use trusted exchange and wallet.
These are interconnected. With what I am seeing with airdrops craze lately, people are running over with the potential profits that they can make easily with these free money.
Too many giveaways are being made everyday and people just typically clicks the llinks and downloads the apps of these unknown projects.
While there goes the people that have been easily and no worry connecting their wallets to these random websites that are part of the task of the giveaway.
Aside from #2, I think you can also add there about beware of downloading unusual apps.