Have always wonder which currency would the world accept if only one currency was to be used. Maybe the dollar?, don't think so, The British won't tolerate that.
Cryptocurrency?. Maybe. Until the advent of cryptocurrency, I never thought that would be possible but it seems possible.
The world is not too far from a unified currency.
Without us knowing it, the world has accepted crypto as their currency. Many use it to buy goods. However, today there is no official determination of which crypto will become the world's currency. Bitcoin has been on various sites to accept payments. It is possible that Bitcoin is a strong candidate.