I think cryptocurrency is primarily an investment right now but it has to ultimately fulfill the promises (or assumptions) that go along with it (including those libertarian things) or it will ultimately become a poor investment too. In the long run, why would it be a good investment if it isn't good as a currency or anything else?

The big problem right now is that cryptocurrency is much harder to use than cash or credit cards and much riskier in the sense that a small mistake could wipe out all that you have. These are problems that have to be solved if cryptocurrency is going to become what was expected.

I'm fairly confident in the long term success of cryptocurrency in general but I'm far less sure that it will be with bitcoin in particular.