Remember, World Reserve Currency Status does not last forever

In fact, it's but a blip on the timeline of the overall big picture.

Bitcoin has a pretty good shot at being the next one up:

(Source: https://twitter.com/search?q=bitcoin&src=typed_query)

Certainly a better shot than anything that currently exists.

Regarding things that don't exist yet, with bitcoin no country can claim ownership of it, which will be appealing to all countries.