Maybe it's not for everyone but I#m looking forward for the ICO of https://vicetoken.com/ , they build an Adult Movie Platform on the steem blockchain where you will get paid for watching these movies. I think the industry is huge and people love money & wanking, so combining these might be succesfull.

btw. In my opinion beetoken will be a hit, I#m also participating in this one, didn't read into the others, so can't say something to them.