I like that last word, martingale is the very common practice//strategy, but most of the time, the enjoyment is not being felt when you
experienced unexpected losing streaks.
In clear and easy terms, we can simply say that the happiness in gambling is when you are winning, and the sadness is when you keep losing.
But then, we all understand that nobody enjoys loosing money, but then, our happiness shouldn't all rely on winning our bets, sometimes, it's just so good to just gamble for the fun, enjoyment in doing it, and not for monetary purposes,, as this can help us to always be happy and joyful even while experiencing some losing streak.