The fact the no country built up a bitcoin reserve early on in Bitcoin proves that countries have no idea what they're doing, if I was leading a country that's one of the first things I'd do. Politicians really have no clue about anything and they don't understand tech or innovation, that's why they're one of the most inefficient types of organizations.
Every nations and leaders of country has the trajectory they are following. Not all nations are interested in technology even though the world is tilting towards that direction. Some countries speciallize in agriculture, while others specialize in other sector, at the end, it's how the effect of there specialty affects them positively that matters most.
Already developed nations that can afford to invest in bitcoin regardless of other economic needs are mostly the ones that are currently investing in bitcoin and making use of it as her reserve. It's somehow a show of how far they have grown technologically because it takes a technologically driven nation to know much about bitcoin to the extent of using it as her reserve. Globally, it will take long to consider bitcoin as a global reserve but considering it nations after nations, it can be possible that way.