It all depends on how lucky a person is, but do not expect a permanent profit from gambling as they are entertainment and carry more losses than profits.
It's hard to get lucky in the long term in gambling, it all depends on our discipline in playing gambling, when we can take control of any situation we will know what to do.
because sometimes a person will suffer streak defeat or you're out of luck on that day, and you must stop if that happens or we could lose all the money in an instant.
that is true and the answer for this are of course no way you can do it.
gambling won't be profitable if you insist to keep playing for whatever reason, you should be wise and responsible. once you got a winning just keep it and forget about gambling. you might could consider it as the real profitable gambling. but not for long term.
Our mate should have that thinking of keeping his profit event though he's lucky of his gambling career as of now. That's true it won't be profitable in a long term. He will going to lose if he won't stop his activities as time the gambling game will ran through recent month's, it will not give you that luck as always.