A world where "property" is anonymous, is a world where there is no private property.
Cypherpunks (not all anarchists, I dont even think cypherpunks are an-archist) are wrong thinking that possession of keys has anything to do with private property. They are not going to win for several reasons, but if they will, the would create a system closest to libertarian comunism than to capitalism.
When you argue with a comunist about property, they can tell you one of those:
a) they are fightin