If the community behind a project is toxic or nonexistent, there will be no spread by word of mouth or social media.  Investors would be turned away because nobody is talking about the project, or they see nothing but immature rude comments associated to the project's name.  This negative first impression will be enough to have them put their money into something else.  It's a huge spiral downwards because as no money is in the project, low volume will make others think the project isn't worthwhile, which it probably isn't.