The most important step is always going to be the player base.   I wondering if this is marketed primarily at the public or more of a Business to Business kind of operation where existing operations hope to encourage involvement by hosting games on your platform with the token capability.       
  Its always hard to acquire new customers is my take on most setups, theres a large start up cost from encouraging people to even visit never mind trust a brand and invest their time and in this case money in the hope of gaining something.    The most obvious currency for all online games now seems to be cosmetic items and in some cases these can be traded and value exchanged, that standing start is hard to beat for a competing idea.
   I'm very interested how you proceed, I play quite a few of these games so perhaps I can test it out at some point.