Good point. But It's hard for any country to switch to bitcoin completely.
It is not only hard but also quiet impossible to switch to bitcoin completely, bitcoin can be a part of investment and it cant be full investment by a country.
as you say, indeed turning our currency into a bitcoin currency is indeed more difficult. because the development of bitcoin cannot be fully guaranteed, and of course the risk is always there. so making bitcoin as a currency and being used by society is more difficult.