Realizing that had I saved all the btc I've gambled with, I could buy a new car.
Those moments when you realize the amount of money that you have lost are the moments in which is more likely that you are going to stop gambling, I have lost money in gambling like anyone that has gambled but nothing close to that, leave gambling at once before you lose more money.
Thinking positively by thinking if you are storing bitcoin and not gambling in the past, there will be other things that still have not made you able to buy a car, life is sometimes very complex and unexpected. The worst moment I had when gambling and potentially winning big, suddenly there is an important phone from may family that can't be canceled, my concentration immediately disappeared instantly because I was following the tournament.