Re: Government to own identity on blockchain in future ?

With so many new blockchains coming on a daily basis, do you think there will also be a time when government will decide to open a public blockchain ? If yes, would they prefer to operate identity based blockchain or something else ?

I do not expect a complete abandonment of the paper money at the moment. If there is the possibility of using the Blockchain by the central banks, I do not think there is anything that prevents governments from creating their own cryptos.
Definitely will not be anonymous currencies and users will be linked to their ID.
Nor do I expect there to be a high transparency for each system.

3. Reverse/delete transaction, which totally kill the idea of blockchain

Basically, it's not much different with today's system.

How can they reverse/ delete a transaction. There is no such thing as editable blockchain ! Basic 101

Not when it's closed and permissioned blockchain where all nodes working together/controlled by someone. I'd bet closed and permissioned blockchain choose consensus method which make manipulation/control easier.

Even though it shouldn't be called blockchain anymore, but few government/companies already do this.