The prerequisite for decentralized private bank currency would be constitutional amendments (1) banning government money and (2) forbidding government banking regulation and deposit guarantees. Without (1), the federal or state government will simply bludgeon and force everyone to use their currency with various legislation. Without (2), the first time a private bank fails (and they most certainly will - complete with sob stories of entire life savings lost) it will become a call for deposit guarantees all over again as politicians fall all over themselves to get back into bank regulation / guarantees. How would we get politicians in DC to agree to give up enormous amounts of power and influence and campaign donations and pass those amendments? They'd have to be forced. I have yet to see in my lifetime any significant rollback of federal government power in any domain. Even the critics of such power seem to become awfully timid once they get sent to DC. Even the most egregious and blatant abuses like warrantless, secret court wiretaps have not even been pruned at the edges, just whined about. The best idea I have to get anything like this done is to push hard into education and take over school curriculum to spread solid ideas about freedom and decentralization (a reverse bezmenov.) Maybe the next generation or the one after can make enough headway to get new, real limitations on government power before the authorities resort to prison camps to cover for their failed ideas.