I just hear it everywhere. I'm sure the whole world has too much at stake if US Dollar loses its value. The economy might stagflate for a while, but I believe it will eventually recover. After all, USA is the largest economy in the world.
The USA does not have the largest economy in the world by far: http://upload.wikimedia.org/wikipedia/commons/7/70/Nominal_G...
Looking at: http://en.wikipedia.org/wiki/File:Supranational_European_Bod... European economic zone is a larger economic group. And the UN is even larger, but hey that's another story.