Of course it's a bubble. But like all bubbles, some people will profit greatly if they know when to get out of it. It's a gamble.
It's not a bubble, it's a snowball - at least in the long run.
Though, I would say freedom is not just _hard_ to control - it's impossible by definition. Freedom is not a short term thing, it's a long term outcome - it's the low energy state that's thermodynamically favored. Eventually the world will be a truly efficient, democratic, free society. But, it takes time and catalysis to get there.
Bitcoin is a catalyst for freedom. It or something like it will be adopted.
My gut tells me bitcoins are here to stay.