Bob is a FUDDER, he will never take the bet, and when he loses, he won't pay up.
He needs to put the amount of the bet in escrow with someone else holding it before you begin the bet.
I know he is. And no need. His word is good enough.
Even if he doesn't pay he'll have to close the account. That's enough satisfaction for me.
Anyway when CRYPT hits $5 I'll be smoking on a beach