Even many times we have seen many people use only one strategy when gambling, and that strategy is the strategy of limiting your losses in gambling. To be more specific, the strategy of setting a specific amount before gambling will only be useful in gambling to control our losses.
Actually is it our bias that if we change this and that and some tweaks we will win big and then when we use that either we win or lose - if we have won, then we think that our strategy is full-proof, when in reality it was just our luck.
Over time that person will keep on using that "strategy" to play but now when their luck runs out they will start losing money but that false confidence will force them to play more and keep on losing more and more.
Hence gambling is that only, you dont make strategies to win, you have to quit to win.