For all the libertarian talk, blockchain technology is all about consensus. Government and society more widely exist because of consensus.
People are lazy; people do not like discontinuity. People will tolerate alsorts of authority in exchange for peace.
So, I don't see everyone suddenly switching to crypto-currencies because it collapses what binds us. They will switch if it has utility relative to what exists, and they won't mind the positives. If there is change, then perhaps Governments will tax and oblige organisations and businesses more than individuals.
Collapse of society as we know it, is something that would not be tolerated by the majority for any length of time.. and certainly not by the existing power and wealth.
I expect the Chinese have words of wisdom along the lines of the art of war, suggesting: work with Governments, rather than against them. In the event that the utility of crypto-currencies empower people and helps distribute power and wealth, then we will see change because of that.. not the other way round.
Liberal outlook > libertarian outlook. Transition to the new normal, don't expect to crash into it.