I use martingale strategy it is easy but high risk.. need big bankroll

I don't know what is the best strategy..
You need a big bankroll for martingale but you also need big limits in whatever game you are playing in your favorite casino, but I think martingale sucks as a strategy because you only need a few losses in a row to never see your money again.
Big bankroll has no use in martingale. It will just eat all your funds until no one has left. I'd rather risk my funds in random betting than using it in martingale.
Martingale is proven that it does not work in the long run. People just believe what they can gain in the short run until they suffer a huge losses than they realise the truth. Casino wont be around if there is something that can win against the house edge.
For me martingale is not even good in the first place. Whether it will be long term or short term, it is not been effective to me. And that's way starting by finding that out, I started to use no strategy at all. I just do gamble the way I was that I afford to lose and betting small amount for each bets that I made. And sometimes I'm just having that feeling where to bet or not.
There's no certain method that will automatically work for all of us, it depends on the game we use the method and who is using the method.