The low quality coin is unavoidably present in Cryptocurrency market. Cryptocurrency is an open system and protocol for any type of idea and it should not be surprising that some project are not up to the standard. It is important we know what good project and bad ones are before we start to invest.
I fully agree with your opinion that there is a lot of project on the market that will not have a future perspective. Such a correction of the cryptocurrency market can lead to the purification of the cryptocurrency world from such projects.