Money will never be earned.
If I bought 22 bitcoin years ago, I will sell without hesitation.
Allow me to use this part of the money to buy other altcoin, and then come up with some to buy a few mine machine for myself.
It's easy to say so... Why to sell if bitcoin is still growing?
Well if you don't want to sell, why are you looking for reasons to sell? Hodl it out until you think the value has reached a level where you feel comfortable about not having to ask people about whether to sell.