Ok this actually happens to my friend not so long ago, he is going on a boxing match and he will bet for the heavy favorite, then suddenly an unknown guy whisper to him, that the fight is going to be fixed and he supposedly heard it from the favorite to win, locker room, are you going to listen to that and bet for the underdog.
What's your take?
It's a risk and it may sometimes be worth to take the risk. If i were at your side, i would have listen to my friend and take the risk. Also you know that if you go against the majority of the bets, you get the better amount on winning such bets.