Hard to believe it's ten years since the Euro was introdiced. Just three years ago, the euro was being praised as the can-do currency that had delivered unprecedented prosperity in Europe.

Now, it's widely derided as a hugely flawed experiment in the wake of a debt crisis that's threatening its very existence — an uncomfortable backdrop as the currency's notes and coins hit their first decade in circulation on Jan. 1.

The question is: Will it get to its 11th birthday, let alone 20th? In the euro's tumultuous short history, it has already been heralded as the ultimate mark of a peaceful, united Europe; scoffed at as a giant act of hubris by a distant political elite; and credited with giving Europe a more influential voice in the world.

Retaining Sterling was a good move for Britain.