This is very different from the current HN headline! After all, sometimes technology changes everything so much politics can do little more than try to catch up.
People like to say "you can't solve social problems with technology". It's a statement that's true enough of the time to be common wisdom but not enough to be a natural law. Sometimes technology does help with social problems.
This isn't to say that politics is unimportant. It is still central. But I think dismissing technological solutions out of hand is also shortsighted. I particularly think this of BitCoin, which feels like a monumental change. BitCoin could, ideally, liberate transactions between individuals and significantly reduce barriers for anything from microtransactions to donating to fringe political causes. It certainly won't solve all our problems, it might even solve none, but I think it'll definitely make for a better world.
I really liked Balaji Srinivasan's speech on "Voice and Exit". BitCoin was an example of "exiting" the existing financial system and providing an alternate means of conducting transactions. Viewing it as such, just using and supporting BitCoin is inevitably a political action, limiting the absolute power of the government. To me, this makes BitCoin one of the technologies to really watch for future social change.