In my opinion, very important. The existence of a community is very important in the course of the crypto currency project. This community can support the ICO that is feasible to walk or not. Without any community behind the crypto currency then I'm not sure if the ICO will be successful. The existence of this community determines the existence of public trust. The more members of the community behind the ICO so the more public confidence in the ICO. This is certainly an important factor in determining the success of ICO. Maybe that's a bit of my opinion about the importance of the community behind ICO.