Of course everyone hopes to buy when Dip and Hold then sells when it is a big profit, when the price of $ 50k in 2021 I think it is the price of Dip so many buy, have the opportunity to sell when the price is more than $ 65k but I'm too optimistic so that it continues Hold and the result is that I lost more than 50% my money.
ATH last year was over 60k so 50k must not be considered as a dip but it can still be normal decline in the price or can also be a correction but when you say dip, it should mean a severe decline in the price but anyways, any decline (small or big) is still a buying opportunity that shouldn't be missed because we never know what if the decline won't continue and there will be an instant recovery or another ath/bull run?
Everything that is too much is bad and that is why you fail right there but that should serve as a lesson to you that next time you might need to sell once the value cross on your buying price. Sometimes it's better to earn small than not earning anything at all.