Emergency preparedness attracts no small number of screw ball ideas. I recently slapped a noob around in another forum because he wanted to put a 37mm flare/gas gun in his BoB. He's convinced it is a good idea. Never mind that he can't give a specific need for it, talking instead of vague generalities.

These would be a little more useful. A little. If you want to horde coins, try for silver dimes. Smaller, lighter, and worth more than face value. A little more.