You can win a lot of money on online casino games. Even with the smallest of bets you can win a lot of money when you for example play jackpot slots. It all comes down to what kind of casino game you are playing. A good thing to check out is the volatility of the game you are playing. The volatility describes  the balance between winning often versus winning a lot. Simply put, different games have different volatility. The higher the volatility is the higher your winnings will be, they will not come as often but when they come they will be higher.