That to me would mean following the Mormon example of stocking enough food to last a year for your family or group. Nonperishable, dried, canned, not dependent upon power supply for storage. The land and the ability/knowledge to replenish these stores by growing more, sounds easy to people who've never done it but I can assure you that subsistence farming is a tough row to hoe, it's often living hand to mouth at the mercy of weather and critters, so don't think it's going to be idyllic. It's hard for people who do it all the time, newbies will fail quite frequently.
Carefully consider where you would be living, the neighbors, the community, the legal authorities with jurisdiction over it. That will matter more than you can imagine if and when the going gets really rough.
Defense, hope you never need it, have a lot of others willing to defend themselves and their properties without turning on you, between you and anyone who might think to come pillaging or foraging. You're circling the wagons and don't want to be outside of it, you don't really want to be on the perimeter.
Wealth? Who will be able to think of such a thing? Not many. If you're determined, know that unmarked gold that is not a known quantity will be suspect. Very few would be able to even distinguish let alone do an assay. Pre-64 silver coins have an advantage in portability and being a known quantity. Jews fleeing ahead of Nazi tyranny sewed diamonds into the linings of coats. Art was greatly prized.
Gold would be a decent thing to hold but I wouldn't depend too heavily upon it. Diversify, look at stores of wealth that are not so obvious. Fine craftsmanship will always be prized, from wine to antiques to art, as well as lesser things.
This bears repeating. I've gardened for years, and even with my experience, 2013 turned out to be a crappy year for my tomatoes and peppers. Where normally I would have 20 jars of peppers canned, and twice that in tomatoes, I have nada.
2013... the year without salsa. It sucks.
/johnny