Wait I thought we already had that... Marvo mentioned it.

Competing currencies are very good things; it means that we don't all suffer because one geopolitical region is failing economically. Look at Europe under the Euro... Greece fucks up, everyone in the Eurozone suffers because of it.

Plus, the founder of PayPal is a libertarian who supports competing currencies... so I doubt he'd allow this to happen.

Globalization doesn't work so well when humans are willing to go to war over silly little things. What would make us agree on a single currency so easily?