Bear in mind that I am a somewhat informed when it comes to politics, but I don't know a quarter of what I should probably know. Plus, I scraped by in Micro/Macro Economics classes so I'm not claiming to be an expert.
From my point of view, I can understand the allure of some sort of international currency. If you have many nations depending on such a system, then I think it would be more stable. Then again, I think gold/silver investment, pus other such investments can accomplish the same thing.
I am just tired of our damn debt ceiling in the U.S., and how long it took New York to pass a budget, as well as the country's budget in whole. It seems like the U.S. can't do anything right with our money... take a look at our foreign debt and growing inflation.
Maybe an international currency would bring stability considering inflation problems, because if there are many countries with vested interests, and it would mean that everyone would want to do it the right way. It could also promote foreign trade and give everyone more opportunities ti buy and sell products that aren't being traded as of now. On the other hand, there could be way too much debate, and things could run roughly. Also, it seems like this system would be incredibly unstable initially, no matter how well it's conducted.