The worst mistake i ever did is when win big money in a casino site and then lost it all when come back again to play
Well, lot of people are like that also they come back to the casino or gambling site for them to get back what they lose but actually they will just lose again. And you cannot recover for whatever reason because you didn't notice that it is already an addicted illness in gambling.
to me i made so may mistakes in gambling from time to time, as for so many time i invested a lot money in gambling and lost my all money that i have at that time, but after that i promise that i will never exceed the limit of my playing gambling.
So it's just like you are saying you have been scammed many times in gambling, I though investing is profitable but in your experience it's different. I guess you need to study well the site you are trusting your money before jumping on it.