I think it's different for every people, I am the opposite. If I win, I can sleep well and contented with my winning and securing 70-80% of my winnings and the rest will be my new bankroll. Though I really experience this when winning before but I know that I need to control that emotion since I will be greedy and will definitely want to win more.

Gambling is very tricky and you definitely know the effect to you unless other people will tell or you have great perspective or already made the mistake and learn from it, I've experience this before and I just lose my winnings that's why, right now, I was able to control that emotion of mine so I won't repeat my mistake.