Instant transactions, quantum proof, no fees, no scability problems, years of development, corporate partnerships, VC investers, foundation members, massive community, no hype (unlike eth with Vitiliks army of shills).
Feel the Tangle baby
If you distribute initially to a tiny amount of people that are willing to collude and manipulate the market it can be 1000000000000000USD
Stealth small ico or insta ico either way you need to distribute initially to as few people who will work together.
POW is really the only way to go. All icos should be widely advertised, open ended in cap and long in duration and have a 50% pow period or the opportunity for such manipulation and collusion will always be there.