So, from your own understanding, what do you think makes people chase loses aside greed which I believe many of us are already familier with?.
When a gambler takes a loss in gambling, he becomes desperate to recover the lost money and an unknown greedy force wakes up inside him and he keeps away from gambling again and again until he recovers the lost money. By doing this, the gambler is not in a situation to mentally control, so instead of recovering the loss, he faces more losses. That's why even if a professional gambler loses again and again, he doesn't go to gamble again and again and he mentally prepares himself later on how to gamble.