-strong business case that's disruptive
-well qualified team running the project
-strong marketing to reach the right audience
Needless to say, technology plays an important role as well, however technology is just the 'plumbing" to the business solution unless the technology is a breakthru.
just my humble opinion.
Problem being, most ICOs seem to focus mostly on the marketing part while utterly neglecting the first two points.
This leads to the typical ICO business plan looking like:
1) Throw buzzwords
2) Issue tokens
3)
4) Profit!
¯\_(ツ)_/¯
This is not problems of ICO's only - most of the businesses are like that, be it a start up or corporation that is on the the Nasdaq. They always allocate bigger portion of money and effort to the marketing rather than product,