Well, history gives us tons of examples of what happens when central currency collapses, and in full devaluations the fewer people with more immediate access to goods, collaborating associates, and weapons, are able to establish gangs, mafias, militias, or organizations that in the vast majority of cases are hierarchal in nature, eventually forming in service around a boss, often in a paradigm driven by cult of personality. Thus true anarchy is a fragile and usually short lived situation, with power vacuums soon filled with competing micro-governments, of which usually one then coallesces to take a monopoly of force over a specific region.