Thank you very much for this article. IMO it is very important not to confound the blockchain "technology" in general with permissionless approaches like most of the coins and tokens in the current market are pushing. The worth of blockchains could easily be demonstrated in "closed" or permissioned usage, where the advantages don't vanish while not being prone to public exposure. - I would guess that in 2-5 years, every business uses some kind of blockchain, mostly permissioned and not represented by the current "coins".