Thanks for your inside, maybe you are right, and for sure no one should put all his assets into one basked, spread the investment.I don't know the answer to the question, but diamonds would be towards the bottom of my list of assets, I wouldn't be keeping a significant amount.
As you can read from some of the forum gurus, leave the EU as long as you can, move everything out there if possible. Sadly not all are able to do that, but places like Dubai and Georgia seem ( I have no personal experience ) to be just 2 places out of many.