In my opinion, currently we have 3 forms of capital mobilization: private, ICO & IEO. The ICO may be a bit old, IEO is a trend but there is no guarantee than an ICO, a lot of IEO fail or a fraud project. I believe that private investment will become the next choice of projects, when they access & raise enough working capital from investment funds, companies, partners, and the community to contribute only 1 very small part or simply support or test the project to receive a small amount of tokens from the project.