I don't know which version of investors the OP is referring to but I completely disagree, can you match your statement with those who have invested in btc, eth, bnb, sol, axs, dot, etc from the beginning or at a certain point where they buy-in?
If you as an investor didn't recognize the right time to sell or buy it is on you but don't generalize it to the behavior of every investor.
Exactly, because timing is really important, knowing when to buy and sell is the right strategy to make ourselves profitable. However, we cannot expect that everyone will be profitable as the demand of crypto for usage is not really that huge, therefore, expect that when some makes money from investing, others will also lose, it's just up to us to choose which side we will fall.