You either lost money, or you lost time. If you are implying that you lost nothing because you didn’t cash out and therefore can wait for a rebound, then you are going to lose the time you have to wait for the rebound. In economics that is also called an opportunity cost. You have now lost the opportunity to invest that money into something profitable because you have now tied it up in something that is unprofitable. You still lost. You are just too dumb to realize it with this mentality.
Worst case is when people with this mentality ride a stock to the bottom insisting it will just take more time to come back, and it doesn’t. Then forcing the person to lose both the money and the time.
I would also encourage people to go to midnight showings of Tommy Wiseau’s ‘The Room’ and watch as people throw handfuls of plastic spoons at the screen. Also fun.