Do you consider Bitcoin(or cryptocurrencies) in general a social movement?
I think that anything revolutionary is involved in the social movements. Bitcoin doesn't dictate anything to anyone. Its freeing nature is what attracted most of us.
It's more like a
social phenomenon.
Is there a formal organization behind Bitcoin?
This forum we're using at the moment to discuss supports Bitcoin as a social movement. Anyone can create an organization that supports it, but it's better if we move as a team, in one place. Again, it has to do with its freeing nature; you can do whatever you want with it.