That should be expected as it is a natural principle. Most projects are dead because of poor management by the team members because they lack the expertise in crypto and failed to seek for counsel from experts. Also, projects with no backing product or tangible ideology behind is likely to go down the drain as it will lose the interest of potential investors.
Most of the coins are just pump and dump coin and it's lifespan is only two to five months so the cryptocoin world has accumulated so many scam coins and this will not yet end as long as there is no way to regulate these ICO's they will just keep on creating these scam coins.