I gamble all the money and then some that I would otherwise spend on anime if I wasn't a stingy asshole.
Wait... to answer seriously.
Never gamble what you don't have.
Never gamble more than you need to survive.
If you lose, you lose, I still have income, and enough as to make sure I won't be crying. If I win, I'll go buy a new TV, maybe go on holiday, or perhaps put the winnings into a saving account which I WILL NOT TOUCH.