I think you're touching on an important point. There are already other vessels for the niche that cryptocurrency fills—at least as far as websites and web services go—that are way easier to both implement and use. With that said, I'm still rooting for cryptocurrency as a general competitor to state-backed currency, that in turn gives people all over the world more freedom to conduct their business without state or corporate intervention. That is most of all about freedom, and the only bogeyman they've yet to conjure against it is "it's used for criminal stuff". Like the dollar isn't also used for crime...