After they gather huge funds from their investors, they are more likely to conclude their project and stop developing or updating it. to keep their community alive, they will keep updating them with news and some false promises which they don't have any actions or plan to really do it in the first place. they also keep changing their road maps which doen't really make sense and finally they will dissapear with their investors money. Most of the time, this is how the pump and dump coin works, so you really need to be vigilant to avoid them.