That's the mistake many gamblers make. After several winnings in a row they assume that they are extremely good in gambling and start trying to gamble for profits. We should understand that statistically we can win several times in a row even not knowing the rules of a game, so if that happens it doesn't mean you are a pro, it just means you were lucky. But don't forget that you can also lose several times in a row even being a mega pro.
I remembered that I was once like this as well. I won small amount and then I realized if I had put more money then I could have been rich. I keep on thinking about it and then decided to deposit more. That is why I ended up losing alot of money because I think I am lucky. I should have known that the only way to make it profitable is to invest in a gambling site