Actually we are don't know future predict. present situation we are that that 2017 for ICOs like as game. because pass 2 year we are don't follow any reaction. but i think all bitcoin holder are hoped that must we can see bright game again like as 2017 year. now all are wait and patience for good day.
IEOs are like a haven for scammers just as ICOs were. They can be used by legitimate businesses too and they can make a success of it but they are open to fraud no doubt.
In future maybe something come along and replace ICOs and IEOs