The future of the currency

I think that the euro experience as a currency has been very good. Since 2002 Europeans can buy with the same currency in all the EU, except some countries, for example United Kingdom for a few countries, like the United Kingdom. Citizens can travel with the same currency, looking at the prices without necessity of needing to translate to another currency. The same way to the for companies. The Using the same currency is the way to overthrow borders. All the citizens in the same world.
I think one day it'll be one currency for all the citizens in the world, maybe all of us can speak the same language and we can use the internet for to vote, instead de of politics. We have the power. And the currency is the key.
Regards.