No instead it would foist that externality on the entire world in the form of carbon emissions and depend on the highly uncertain future value of a cryptocurren

No instead it would foist that externality on the entire world in the form of carbon emissions and depend on the highly uncertain future value of a cryptocurrency. And it would still require a third party to benevolently run an app to search and make sense of the data from the ledger, and also to verify that the data inserted was actually real and not poisoning the db.