I'll be getting a $3k bug bounty from Uber in a few days. Need some money now. You can choose to trust me or not. I'll show you proof that I've done it before.
If no one trusts me, you'll all be pissed off in two weeks when I sign an address with $3k in it.
I'd rather be pissed off for not getting $200 (which have very low chance of happening) than for losing $2.8k in a stupid way (high chance of happening).

This shall be a better logic here.
One would rather invest to some coin than losing 2800usd without the joy of trading on exchanges.
If you have that 3k usd later, lend some money to someone who needs help.