Europe has tried to unite behind a single currency…it hasn’t gone well. The member states‘ economies are too different…and that’s just Europe. You are claiming you can do the worldwide? Because the US should use the same currency as Cambodia and Zimbabwe? That is pure delusion. Sometimes things haven’t been done for a reason.

Doing what everything all other coins do is not a reason to adopt it. You need more than that. Otherwise there’s no reason to change.