According to a few smart people (that's not me) the next big wave of ICOs are going to be for existing companies. Some ICOs will be "voluntary" (the management team agrees) and some will be "involuntary" (the ICO is hostile take over)
The gains will be 100X generally, much more dependable because the companies have existing revenue. Twitter makes $2.5 Billion/year.
So....
What company would make a good target?
I would imagine any well known company would blow up in the crypto world. I would probably buy into the ICO of ANY company I have previously done business with -- I don't think it would matter much which particular company it was.
I'm honestly surprised this hasn't happened yet. I am sure it's only a matter of time.