centrally planned economies do not work well, but the focus here lies on the word 'central', not 'planned'. All economies are planned to a significant degree, albeit in corporations (which internally do plan rather than rely on market mechanisms). The equivalent of cryptocurrencies in the economic sphere would be turning every company into an army of independent individual contractors whose only tool is the legal contract. This would lead to unmanageable complexity and overhead that would be unacceptable and very soon end in people naturally organizing in competent hierarchies, producing the dreaded institutions and middlemen that cryptocurrency tries to do away with.

Read for this very question Coase's essay, The Nature of the Firm.

Obviously there is a happy gray between completely black and completely white.