I am sure that it will not be a problem to collect hard cap, because 6 million for such a project is not huge amount of many. On the other hand, now there are many similar platforms and investors may not be interested in it.
In any other project, I would say "you need to add advertising", but in this particular case, I think that with the advertising of the project everything will be in order!
Advertisement of the project is the second most important after the development of the product itself, especially in the early stages of ICO, because it is at the beginning of the project and investors are evaluating it.