Imagine me creating a topic in 2017 asking if doge coin can hit 0.70$ some day the answer would have been NO from almost everyone, what I have learnt from crypto projects is no matter how stupid a coin looks and you need to get out because its not doing fine always leave a bit behind, I sold all my doge coin 120k before 2021 bull market and left only 1067 Doge coin in my wallet, learn from my mistake.
The thing is, you are pointing out one coin out of thousands that have crashed, dumped, depreciated and that was the end of them, only very few actually dump and appreciate again, mind you that quite a lot of them are also created to scam people, will you also expect coins like that to pump anew, and then with the thousands of them there are in the market, you cannot know which one is good.
Having said that, imo, altcoins are short term projects and one shouldn't regret selling them when they did, if you like altcoins it is better to keep buying and selling them continuosly, if you think one is pumping, or will pump, you can buy it, and sell when you get ROI.