A fully public, fully transparent, immutable ledger is "useless?" Only if you don't believe in accountability and transparency. What with modern voice and fac

A fully public, fully transparent, immutable ledger is "useless?" Only if you don't believe in accountability and transparency. What with modern voice and face morphing technology, I'd expect major news organizations to start signing their releases onto a block chain to allow us to spot mutations. Currency is just one potential use case of block chains; there are many others.