[ericb]

I made no prediction about it usurping the dollar.

I'm saying bitcoin can do things money cannot. I listed some use cases that demonstrate the kinds of things it is suited for. When the PC first came out, the life-changing uses seemed theoretical and vague, and for about the first 5 years it was mainly a more expensive substitute for a typewriter.

Uber is marginally better than cabs, but that's more than enough to cause disruption.

edit: You know what, I didn't argue about it usurping anything, but I would put this out there as a point in that direction. There are enough use-cases like what I list to get bitcoin to a critical mass of fungibility. Products supporting new valuable use cases don't usually disappear. So if bitcoin supports these use-cases, it is entirely possible that they will propel it to a scale where peer-to-peer transactions make sense because it is prevalent enough. At that point, it could become the lingua-franca of currency.