Euros will be short lived now, and the reality will catch them once the DM get to more appropriate 2 USD or 2 Francs.

Euro as a even worst Gold Standard could very well manages to bring wars back ( remember that Austerity was the talk of the day in France circa 1936, Germany being freed from GS, was investing like mad in its industrialisation, getting far ahead of its "masochistic" neighbour)