I think that we are witnessing the logical evolution of this kind of bets. Like in sports bets, where at first you could only bet if the team A was going to lose or draw against the team B, but now you can bet on just about anything you can imagine, like the number of assists from a player of your choice before certain minute, we are getting used to other kinds of bets like electoral ones, where apart from the obvious "who will win the election" there is room for almost any circumstance around the elections you can imagine.

Not sure about it, but if I had to bet, I agree with Davidvictorson that Trump will probably say "Bitcoin"