While traders are bearish on the euro we need to remember the greater context of Europe and the origins of the euro currency. The euro as an economic union was built on a similar U.S. model, that of a Federal State comprised of individual "united" states. However, Europe is much different than the U.S. historically, demographically, and geopolitically.
http://seekingalpha.com/article/845531-europe-s-crisis-much-deeper-than-euro-currency