Because of the entertainment and the will or thinking that you will win big once you gamble even when you lose you still think that you can recover and win.
looking from the outside it's a stupid behavior, but you're right. Few days ago i see a player went up 140 bitcoin from 2, after some days i checked his profile and now he is -13 bitcoin and he have lost all his money. Gambling is a beast
Thats the result of addiction you will lose all things you had... i experience it before but i stop because its a bad luck for your life. or its just a curse
That's its hard to forget.. but honestly now i can control my self for being addiction sometimes i just play for having fun and to have some profit if i think i will still lose i'll stop so that i can't lose all my money.. gambling is not for living gambling is for fun..