Losing the money in gambling will be the risk that we could get. We cannot do anything to prevent the loss, but we can prevent on how much money we should use to gamble. No matter if we are rich or poor when we were playing gambling we should think about the loss so we can know how much we should use the money.
Besides that, we should leave the gambling site when we know we don't have a chance to win the games. That will be the best way for us to prevent a big loss. It will difficult to do if we are getting involved too deep in gambling games because all we want to do is to win the games. If they are rich gamblers, they will not have a problem to lose some money. But for people who don't have much money, then it's a problem for them.
Gambling is losing or earning of money. That's why if you can't take a risk then don't gamble.
That's bullshit act of them trying to recover the lost what they encounter to them and better to stop this kind of attitude since more losing streak will surely come unto them.
But on the other hand not all of the gambler come is sick as that since there are people comes just to have fun, I have meet several gamblers who laugh when they lost but they only bet a few bucks just to satisfy thereselves for there gambling tantrums.