Currently on the coinmarketcap site only about 1590 projects compared to at times more than 1700 projects. They have left many projects without developers or scam projects. I personally invested in some of these projects and lost a lot of money like bitconect and centra. Do you trust the projects you are investing in and will keep them for a long time until they succeed or are they just looking for profit in the short term?
In the current market conditions of crypto new projects is really difficult to survive. Some of them offer interesting ideas and technologies, but do not have a strong development team and a large community for the necessary support. Therefore, they simply cannot convince investors to support their projects.