Few countries are serious about using Bitcoin as reserve, but this may change in the next ten years, especially with the increasing interest in Bitcoin ETFs. I would project that Bitcoin could be at par with gold in the 20 to 30 years due to increasing affinity to digital technology.
"May change"? It WILL change, and the nation-states will never admit it, but in the next ten years, nation-states will sell Gold to purchase Bitcoin.
I won't predict the future (10 years or 20 years) because that is beyond our ability but with what is happening now, I am pretty sure that it will not happen in the near future.
For countries, holding gold is a backup plan for the economy in case of a major crisis and gold has been recognized as the world's safest haven for thousands of years. Meanwhile, bitcoin has not escaped the label of a speculative asset and is often dumped whenever the economy is in turmoil. And what governments are looking for is a safe haven rather than a speculative asset. How can the government sell gold to buy bitcoin?
The goals of retail investors and central banks are not the same, they do not need a volatile asset, we should accept that fact.