The more advanced the crypto world, the more new projects compete with different concepts because they adapt to the modern era. Many altcoins or large projects are dim due to the lack of following the modern era. Investors move to other projects because of the potential needed, if there is a lack of community potential and others. Altcoins tend to decline if the project founders are less innovative
Innovation leads the funds back to those who try to follow or imitate it

With it, comes the potential for any project, really.