There are plenty of Adult based Alt-coins already.   If you have an actual project, you may want to talk to one of the Dev's, as they may do what they can to help you out, since they haven't really hit the market very hard yet.  One in particular would be Sexcoin.  I think they might have a few Toy shops, a few Cam Girls, and a few Escorts accepting it, but other than that, they need a good market.  

Aside from that, any other alt coin or even BTC would be happily accepted for any Adult project you have.  I'm sure whatever project you have is not on the level of what is on TOR, and they all happily accept BTC.


Edit:

Oh wait, are you asking if a Crypto coin would accept being in an adult service industry, or are you asking if you think we think that the adult service industry could use a Token based cryptocurrency, and that you would try to create it.  If that is the case, it's been done before, and hasn't have much traction yet.