We indeed need to wise up with all this scammers all around, they'll do anything to loot from us..
It's unfortunate that man played on your intelligence and use fake note to buy from you and still get change.
Ponzi scheme is another modern way people are being scammed, I remember that of mmm and the likes, we just need to wise up.
Absolutely anything to loot us, this is why is important we maintain low profile at all times. And reduce the way we allow people persuade us to do something we don't want to involve ourselves with.