There was talk on the internet last spring about a few rich Islamic countries converting their hoards of gold and the US dollar into hoards of bitcoin.
You're right, there once exist a number of countries that made this decision, even as we talk today, we have Saudi Arabia as one of the top crypto friendly country in which are also fast growing in the adoption of cryptocurrency.
In June of 2024 Saudi Arabia did not renew contracts from 1974 that created the 'petrodollar system'. This required Saudi Arabia to sell its oil exclusively in US dollars.
Many countries including Saudi Arabia now are waking up to realized what they have been missing over the years and now work thoroughly on how they could explore their mineral resources themselves without full dependence on USD or US, we have so many similar occurrence like what is happening in Burkina Faso and many other African countries.