Buy high and sell low, a very wrong decision that I've ever made during my early days in crypto. Coz I thought that I could manage to hold during the bear season but my emotions made me hard and fall to selling on a losing end.
I keep remembering those days and even there is a time I think about quitting but  I realize committing mistakes is not usual, instead, this helps us to correct our mindset and to learn how to control our emotions, especially during the difficult times.