A friend of mine who has a property in France and a reasonable € deposit account in France moved most of his € balance to Norwegian Krone last year (at my suggestion),and got a better rate, plus a 10% currency gain so far.

Of course, NOK/€ could equally go the other way, but I see NOK as oe of the soundesr currencies there is for the next 10 to 20 years at least, being energy backed, and a reasonably competently managed economy.

Or alternatively there's Norway's Statoil, which pays a decent dividend on its shares, actually takes a long term view to investment, and IMHO has a floor on the share price, because the government tends to buy the shares (they are majority owners) if the price drops.

Worth  thinking about if you wish to diversify your € risk. In my view the € is not sustainable as a currency in the long term without a fiscal integration which was always going to be difficult, and which I cannot now see happening.

"The future is already here -- it's just not very evenly distributed" William Gibson