Big losses is the reason for quitting trading. If there is a pie chart to represent this, 99% of the pie chart on why traders quit will be about the big unforgettable and painful losses while the one percent will be about other factors/reasons. Humans will always follow the path of least resistance and quitting which is the easy thing to do is the path of least resistance. I also encourage quitting if you haven't found yourself yet/are following others or found something else in the crypto space you know you can be better at other than trading.