When you guys are gambling and already doubled your bankroll, do you still play with the whole money you got or you take away half of your bankroll and start playing with your profit or not?
Just gamble with money that you're willing to lose. Or invest in the long run when odds are in your favour.
Actually it is quite common that gamble what you can afford to lose but I would also like to add that playing with your profits is just like waiting to lose and eventually losing because gambling gave you profit then you were not happy and keep playing with your luck and after loosing you will fee like you were unlucky while actually we were stupid to play with our profit.