If your game is only about making money, the statisticians claim you can't lose. Then, they trot out a wagering system that proves as long as you bet the same kind of horse and have a large enough bankroll, winning is a foregone conclusion.
The basis for this folly is setting a dollar goal per-bet, add losses from non-winners and according to the odds of your next selection wager enough to win back losses and the stated profit. I'm sure it works on paper.
Somehow, though, I can't fathom making a $334 win bet after losing four or five in a row. God forbid the new wagering amount should this bet lose.