there are a lot of reasons , we need to talk about each project separately . some projects can't raise the soft cap . other projects are experiencing legal problems
Very few campaigns are carried out by the ICO for the benefit of people. Many do not have a real product, a lot simply repeat the failure of other projects.
Now on the falling market, the investor simply does not want to invest money in the unknown. As soon as the situation on the market stabilizes, everything will immediately fall into place.