Blackjack is a game that is fun to play but is very hard to gain any amount of money in. If you wanted to double your money the easiest way is to bet it all on the first hand. The more hands you are in the more likely you are to lose that money. The other way to win money is to count cards or have a system. This is a rikier way because if they catch you you could be banned and put on a casino blacklist. That is highly unlikely as long as you don't stick out so if blackjack is your game you must have either lucky or a memory that is a steel trap for numbers.