Beating online blackjack is an extremely difficult task. For one, casinos would not put a game up on their site if they thought they were going to lose money by doing so. This implies that pretty much any virtual blackjack game you find will cause you to go broke if you play it for long enough.
If this does not deter you from testing your skill and luck online, there are a few things you can do to maximize your winnings and minimize your losses. For one, you cannot profit with a straight flat betting system. You must vary your bet from hand to hand in order to gain an edge over the casino. One method that works well is to let your winnings ride on a hand. If you win a hand, slightly increase your bet size for the next hand. Doing this allows you to vary your bet with a higher degree of safety since your bet will be comprised of money that was not yours to start out with. After you lose a hand, go back to your original bet size and work your way up again. You will lose some big hands in this manner, but you will also win a few big hands.
Trying to double up your bets after losses will quickly get you into trouble. When you do this, you run the risk of losing money that is already yours. Any doubling up system also will quickly exceed table limits. Although table limits might seem high at first, they are set low by the casinos’ standards in order to protect them from such a system.