I really think that Bitcoin has the potential to outclass gold as a global currency standard. The main reason is that gold is becoming way too expensive in terms of storage and shipping. Furthermore, if you plan to use gold in global transactions, you have to undergo burdensome customs procedures, that do not apply to Bitcoin or other cryptos.
Yes, I think it was the best the world had until Bitcoin arrived...
If you look at the world today, I don't think a new country would start buying reserves in gold, as it is incredibly impractical.
Bitcoin is the new way of storing value. and the countries and people that realize this sooner will end up much better than the ones that use gold.