With an inflatable currency, a government could always just inflate its currency in order to fairly tax everyone who holds any of it. It's also possible to bui

With an inflatable currency, a government could always just inflate its currency in order to fairly tax everyone who holds any of it. It's also possible to build an anonymous, auditable cryptocurrency such that a government can verify that taxes on transactions have been paid, but not not know the identities of the transactors unless they don't pay. Which is pretty neat.