A while ago i went all in ZClassic and bought about 365 Coins when the price was about 2$ per coin, but i decided to sell a couple of days after.
Two weeks later zclassic mooned and i could make about 80k now.
i learned my lesson in the hard way..
I am sure your decision to sell immediately is because the predictions you made were wrong, but you don't regret it for too long, make your experience as a lesson for the next, I'm sure this experience will be very valuable for you in the future so that you think first before deciding to sell .
this is still not the most expensive lesson, take a look there are many stories on bct when much more money was lost.