Hard assets are your only protection.
Here is my priority list.
1. Long term food storage, and lots of it. Enough to last you for several years.
2. Water purification, or have your own water well.
3. Guns, ammo, and all related accessories, along with the proper training.
4. Communications gear and training, like ham radio.
5. Medical training along with the proper equipment and supplies.
6. A way to generate electricity, along with conditioned fuel that will last 10 years minimum.
7. Alternative ways to make electricity like solar, wind, hydro or whatever.
8. If you have all that covered, and still have some wealth to protect, then get silver.
Here are some websites you might want to look at.
Radio gear http://www.fm2way.com
Solar power http://www.fm2way.com/goalzero