Yes i believe that it is normal to lose your money because in gambling thier is a two major people involves here. The winner and the other one is loser. You can back your money when you are loses when you have the tactics and know the flow of the game and you must not to become greedy you must know your limmitations. Because when you are gamble you might know and have you limmitations because you cannot win or be a winner at all time just know how to stop and mannaged about it.