I think they will still use blockchain for secret purposes, or specifically information… related to security or defense issues for example. Given the special security nature of blockchain, especially bitcoin, they could use it for a number of purposes. We cannot know what they will experiment with or what the ultimate goal of the government is until they announce it. One thing is for sure, they will try to understand and try to use blockchain first.
I believe there are already countries that are exploring other usage of blockchain beyond financial aspect of it. Like for example, in El Salvador, since it is considered as legal tender, for sure, they are also trying to explore other usage of it. Because as we have seen, transparency and the speed are just few benefits of this network. Wherein such features are already good advantage to improve the services of any business or industry.