Math is against you, golfball. Making bets like this long term is a money-losing proposition.
Think of it this way: Imagine you have a 10-sided dice and you're betting $2 to win $1 that any number OTHER than a 1 will be rolled. Your chances of a winner are very good.
Now imagine you have 5 10-sided dice and you're again making the same bet, this time wagering $1 to win $1, but if a 1 is rolled on ANY of the dice you lose the entire bet.
That's a really simplified version of the math behind these bets. There's a good (but very slow to read) book that addresses all kind of math behind betting by King Yao, titled "Weighing the Odds in Sports Betting."