You are correct the right investors are those who know when to act both in when to buy your coin and when to sell. Because most investors who are complaining about the bad cryptocurrency market are those who failed to act in the right way and at the right time.
Because the market is also to blame. We do not know when something will go up. And something collapses and will not be worth nothing. So let's just focus on what we have, let's study the market and not allow silly mistakes.
We do not know when the market will go up or down. Why blame the market? the market is simply as a measure against the ability of on growth and employment from the developer. When the performance of a good developer then the value of the market will also rise.