It would seem the mindset of some countries and banks is that 'blockchain' is just another mechanism that they can control or dictate the terms for.
The basis of crypto is decentralisation, and national Petros, JMP coins and the like are not, they are centralised and hence somewhat doomed due to limited adoption. To gain global acceptance, a coin, or anything really, needs users, a mass of people.
The only difference between digital fiat and cryptos are ownership of the system, so it is the decentralised part that is the differentiator .
https://cryptodaily.co.uk/2019/02/crypto-network-to-be-launched-by-japanese-bank