Which gets me back to real estate, cant be confiscated or disappear.
That would be my choice. At least you have a roof and land that has some intrinsic value.
Au is only worth as much as those who subscribe to the notion that it has any worth, value it. ie it takes a group of like minded "nutters" to keep the price where it is. Of course, if you have enough of them, anything is possible but I think as the decades roll on, the youth of today will wonder what the fuss is about and it will die away.
Aside from being an historical oddity and a few minor industrial uses, it really offers nothing in terms of usefulness.
All that aside, I used to work in a Gold/Copper mine back in the late '80's and early '90s but I am certainly no expert.
Another option is to buy nuggets themselves A Charters Towers mine is selling them
http://maximusresources.com/sales.html