I have never played gambling, but I know for sure that it is impossible to win the lottery or the roulette. Perhaps as an investment it will be profitable, I do not know.
I disagree with you, it is impossible to win constantly, but winning one-time is quite real, especially at roulette.
Knowing that I'm not a lucky person. Will turn up in a casino or similar games, I will not! And the money is safe and nerves ok!