holy shit there are some mother fucking retards in this thread
1) even if you play a mathematically perfect game, the best-possible expected return in roulette is 48.5%, making it the least-favorable game (for the gambler) in the casino
2) blackjack, both with-and-without card counting, is the most gambler-favorable game in the casino. even if you play a mathematically perfect game, without card counting, the best-possible expected return in blackjack is ~49.8% or so. still losing money! any money you win without card-counting is a hunch!
3) you cannot "beat the system", ever. there is no system to beat the system. you cannot "fool" an independent game of chance by shouting "LAW OF AVERAGES" at it until it takes pity on your bad-at-math ass. if you win money gambling, it is because you got lucky, and if you believe otherwise and there is a god, he will take away all the money you won and deliver it to me (because you are a stupid asshole, or maybe because i own a casino). the best strategy, no matter if you are currently winning or losing, is to immediately walk away from the table.
note: with mathematically perfect or computer-driven card counting, blackjack can yield up to 51% expected return. this is why bouncers beat you up for card counting, and casinos invest millions of dollars in algorithmically detecting it. if there was a working system of gaming the casinos, the casinos have already detected and beat-the-shit-out-of it. or else all casinos would be out of business today.