If I was a UFC fighter and I'm allowed to bet on myself, wouldn't that be a good way of 'earning' extra income? I mean take Demetrious Johnson's run for example... he complained about the money he was making even though he was on a ridiculous winning streak. Had he bet on himself winning every fight, he would've made so much more money. Especially with the way he fights (lots of decisions) he can just win on points and always bet a decision win giving him pretty decent odds overall. If they are allowed to bet on themselves, do we have any examples of fighters betting on themselves?