After rereading my post above I realized that I described something that can happen only in a parallel universe. The max profit on bet on freebitco.in is 20 BTC, so you can't actually win 160 BTC in one bet.

But now I'm wondering is there a limitation on max bet amount, or is it theoretically possible to bet 2,000 BTC with 94.06% win chance and win 20 BTC, taking the 1st place in the wagering contest in the meantime?