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?
Yes, there are so many projects now that are dead and getting failed because the ICO did not reach the soft cap and the goal of the project. That is the main reason why many ICO's now are dead.