Depending on the time scale I don't think it's the Euro you'll be worrying about - sadly it won't be the Pound either
My money would be on the Yuan.
Getting back somewhat to Katrina and the discussions of levee maintenance - for years governments (especially in the US and UK I would suggest) have been moving away from funding long term very expensive infrastructure projects, especially from the public finances.
Although there may be good reasons for this it does seem to have been getting worse since the late seventies and early eighties - and the short sightedness of it is going to bite us in the butt sooner or later.
I wish I didn't know now what I didn't know then