Well i have something interesting to tell you all in here.
At the beggining, i thought that i had the key, the secret, to win on Roulette.
I was always winning, and it was something brilliant for me, but in the end, it is impossible to calculate how the rows are going to be.
So, i ended up losing a bunch of money.
This is the the fact that people do believe they know wining from gambling's trick and might be they would have even won but it cannot be a continuous process and if you continue gambling for long time as you mentioned you would end up on a losing note. So better to either take the winning amount in beginning and move away or just gamble for fun.
First of all, there is no gambling trick which will make you win. Even if we believe anyone got such a new trick of wining, he should use the trick twice or thrice and take away the profits. The gambling houses will soon know the trick and they will counter it, so there is no trick which can last forever.
You need to be intelligent enough on when to apply the trick and how to gather profits.