I'm always a bit bemused by sentimentality about money. I'll get sentimental about languages, customs, folklore, stories, the traces of the old religion under the new. But money???

The euro is the same across Europe (and yes, there are countries that have stayed out, and countries that haven't been allowed in). But my handful of change has coins from all over Europe, showing where people have travelled.

It seems to me a people-friendly thing to have a common currency, whereas different currencies may be business-friendly and politician-friendly.