I see a lot of chaos there, for example those who think that Switzerland and UK are part of the Eurozone... Really?
By the way probably EUR won't drop below USD and the Eurozone won't collapse after a hypothetical Grexit, just because Greece is too small.
Actually the only downside of a Grexit and the consequent bankruptcy is the public exposure of Germany (65bln€), France (49bln€) and Italy (43bln€).
As you can see here: Eurozone countries exposures to Greece - 2011 vs 2014.
But that's not a really big deal actually.