In the past I did learn that there is also another FOMO. The fear of selling. We must remind ourselves that it is only a profit when the money in back into fiat. Otherwise it is only a virtual profit in my eyes. But each time I do want to sell, something in the back of my mind tells me that it is too soon and that it can go higher. So the fear of missing out some more profit. This goes until the point that I did miss the peak and in crypto the missing out of the peak often results in a major decrease in the coin you were planning to sell :(
So yes an exit plan is a great idea, but only if you do follow and don't step into the feam of selling.
Cheers,
Peter