The Euro project is ongoing. However, those who shoot at it have to turn the gun on the USA for the same reasons now, since our current government is turning away from transparency and fairness and starting to serve only its venal growing oligarchy and a turn towards a Russian/Hungarian-like model of governance.

The Euro includes a lot of governments that have no history as western liberal democracies that value political and economic transparency and empirical decision-making. Yes, Germany alone would be crushing the dollar and every other currency with the old Deutsche Mark, since it is probably the most uncorrupt, transparent and well-run economy on earth. But, because of history and good leadership they are sacrificing a lot to try to spread the same policies and principles to the former Russian/communist puppet states. This should be called out and cheered.

Virtue is not measured by a currency or the silly abstraction of “store of value”, but it is certainly defined by having a practice and tradition of good governance. And the reward for western liberal democracy and Keynesian economics has been the only and longest running successful model on earth.
Not just virtue-loving people embrace this fact, but ethically neutral rational empiricists as well.