You just proved OP's point. Cryptocurrency which isn't seriously decentralized is pretty pointless - you might as well just go back Wells Fargo and an Oracle DB.
Decentralization is one of the defining traits of a cryptocurrency. It's like saying a car is an airplane, but without wings. It just doesn't make sense.
Hell even bitcoin doesn't have a great notion of verifability (verify what? No double spending? Lets hope your opponent doesn't control 33% of the hash power.). Central-db systems can issue recipts (like humans have been doing for thousands of years). Centralized cyrptocurrencies basically offer the same protection at best and much less at worse.
Your definition of crypto currency and decentralised currency is conflated too.