What is the worst that can or will happen to Europe in this crisis?

[Queen Mum Inks.LWC]

Is there any chance that the euro could be discontinued and the countries go back to their original currency (franc, mark, lira, etc.) ?

That'd be pretty hard to do, I'd imagine.  They'd be going to a brand new currency, whereas when they switched to the Euro, it was an already established currency.  The only countries who might be able to pull it off would be Austria, Germany, Ireland, and Spain, since they still semi-accept their old currencies (I believe - correct me if I'm wrong on that).