Usually they will use certain strategies such as martingale to get back some of the money they lost because with each bet the amount will be increased for greater returns.
Well, I am a person who has always been playing in casinos and sometimes it is necessary to make 1 martingale, however it has very devastating consequences when you lose, that is why both in the casino and in trading I only make 1 martingale, sometimes in trading By doing 2 martingales I was doing very poorly and I was decapitalized, that is something that has to be seen, that is why when talking about the martingale I do not recommend it at all, it is something that can be very significant when winning, but you only have to measure the possible losses .