Do you consider Bitcoin(or cryptocurrencies) in general a social movement? If you consider so, social movements need a formal organization to support the movement. Is there a formal organization behind Bitcoin?
Probably, as bitcoin is borderless, anyone can join in the movement and promote bitcoin around the globe. But I would say it's informal movement, others might see bitcoin as a way for financial freedom, majority wanted it to a be a payment scheme, majority as store of value and make profits in the future. So loosely, bitcoin can fit on any social movement that we have seen in the past, but no concrete definition per se.