I think, to be more precise that it depends of the moment you sell and the amount you sell.
The price move all the time. Selling a big amount tend to make the price go down.
Holding tend to make the price go up.
Also, anytime a hater could come and spread FUD around to make the price go down.
A whale could also come and pump the price up.
I feel so frustrated when I sell low and see the price going up after so I always hold.
I can hold for months before starting to sell.
Until now, this strategy always worked (but I don't hold any shitcoin).