Random betting without a plan or system can make you lose your money faster. The different bets that you can make in roulette have different odds of winning. For example, an outside bet has an almost even chance of winning, while betting on a single number has a 1 in 37 chance of winning on a European table. Planning your strategy, and implementing a betting system helps you become more methodical and calculating in your gameplay, and potentially win more money in the long run.