Pro-tip: use that 15BTC to get some treatment for gambling addiction. If you're spending more than you can stand to lose, it's a pretty obvious sign that you're addicted.
I can almost guarantee you that you'll just gamble that 15BTC anyway.
Worst advice ever! Why don't you suggest him to do something else with that money, 15 btc is a lot of money he can do something much better with them then to spend them on some treatments.
If someone is not good in something its reasonable to assume that you will stop doing that, if you suck at dices don't play them. And if you are not skilled gambler who forced you to sit with 10000 dollars? You could try with 10- 50 dollars, and if you see its not going to quit on that.
No one should commit suicide, especially for money. You will earn more and you will have happy moments, think more about your actions next time and everything will be fine.
A real pro-tip: sell your remaining Bitcoins at a price point you are happy with and deposit that money into a bank account and quit gambling for good.
You will be much much happier 10 years down the road.