Attempts to return the lost will only aggravate the position of the gambler and he will leave even more of his money in the casino. It's like chasing a shadow: the more you lose, the more you want to return, and this gives rise to new losses. A vicious circle of player addiction from which it is almost impossible to break out on your own, if it has already come to this.

In gambling, you can't let your emotions take over. Either stick to the strategy and increase the deposit, or act thoughtlessly and drain the entire deposit. That guy's story on Reddit is a case in point.