Every nation that considers using bitcoin as her reserve already knows that bitcoin is a volatile asset and so would make plans on how to leverage volatility to her advantage. with the USDT, stability is guaranteed but there is no guarantee that more profitability can ever happen. most of the nation that consider using bitcoin as her reserve looks at it as an option hat serves as an edge against inflation which is what the fiat or gold can not really do as much as bitcoin can do.

Gold is not a perfect invention and certainly not a perfect reserve currency. the fact that gold is a physical asset that can be destroyed if an emergency hits the country that is using it as her reserve is an issue with it but with bitcoin, such is far from the case.