a lot of new coins grew indicating that more and more market players began to use crypto to replace fiat currencies,
Not necessarily correct. There are people who are doing premium purchases and then dumping when the coin get listed. They buy 100$ worth of every new ICO coin and then dump it at whatever profit they can.
the opinion about new coins was very dependent on natural selection, which was about the quality and strength of the coin, for quality coins it would last and will go up, this is also about the economic foundation and business of the coin maker itself, does it have a wide marketing network or not.
Correct, every new coin does not mean that its the solution to a problem. It also depends on on several other factors and thus people should be aware that even if the roadmaps and the whitepapers seem convincing they may not become successful in future. Thus they should be careful in what they put their money in.