this whole topic is talking about a government issued coin from an investor's point of view but it is not the only way of looking at it. you can see it as another currency issued by the government. just like fiat people are going to easily use it so it will become popular at least in that country.
but also you should remember that these governments are issuing a "currency" not an investment an also it will be centralized. these two simple points mean such coins will be stable. so investing in them is not really something to be discussed! it is like saying will you invest in US dollar that US government issues?!!
You have good arguments. Investing in government crypto-currencie wouldn`t be an investment cause it`s stability, it
can be store of value for people who trust in it.
If government issue a crypto-currencie it will not a be a choice for people who live in that country to accept it or not.
Governments have ways to force people and companies to use it. There can be referendum before accept in it, to ask
citizens are they willing to go forward or not. I would vote for yes, better transparency, faster transactions, more safety
and bigger security, why would anyone say no to this things?