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.
I will draw the conclusion that good gamblers might be people who understand that there is no definite strategy for winning in gambling. so they can realize that the strategies they use at any time could doesnt work, and he can come out when in winning situation