I agree that there is not a lot of evidence for ancap philosophy working in practice. That is because nature fills a vacuum and so absence of state power will always be filled. There is endless evidence that all governments (left and right) eventually get captured by bad people and devolve to violence. Violence is the language of the state when under threat and when unopposed. It comes at least once a generation like clockwork. Maybe, just maybe Bitcoin can act to fill the void left by governments. Rules without rulers can only work if we can enforce those rules without empowering despots. Because of Bitcoin this may be the first time in human history ancapism can truly work. And why not try. We know the alternative leads to blood and tyranny.