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.
If we talk about the world, it means that all countries must participate in it because the name of the world is not only one country, although it is also very natural that Britain does not tolerate this because they highly respect their own country's currency, and if all countries have agreed united currency, the UK will be compelled to follow suit.