Hard to said this but we must be truth to ourself.
That's important so we can improve if there are necessary things to improve, in gambling all you do to win is to improve and just don't gamble relying on your luck purely, that will not work in the long run.
Gambling is the most risky among all the investments ventures and it is really very difficult for you to continue making profits.
Gambling does not belong to investment, if you are talking about investing in a casino like putting your money in their bankroll, I would say it's less risky because house wins most of the time, so most likely you'll be profitable in the long run by siding on them.
I believe that currently we should not hesitate to make this prayers that God should put his favor on us and for us to keep making many winning trade than 2018.
Whether we are gambling or not, we can make prayers and we pray not only if we ask for something, but to repent and thanks God.