People are right now. This currency is live, transacting, and secured by a rapidly increasing amount of computer power. On the subject of their rationality...
Would you be willing to take a bet on where this currency will be in terms of net worth vs BTC in 5 years?
No, because that would be illegal, and a possible conflict of interest for me.
Private social bets are not generally illegal, but if you're really concerned, offer the proceeds to charity.