they have the idea with the penny. minted before a certain date, these pennies have more copper then the pennies they mint now and are worth more then 1 cent in the weight of the metal itself.
so some group of guys have a deal with armored car companies to count/sort the money/deposit/provide change for the customers they transport money for. in the process they weed out the older copper rich pennies for storage and because it is illegal to destroy currency as of now. BUT there is talk of getting rid of the penny so if that ever happens these guys are said to have millions of dollars in valuable copper stashed away in pennies. yeah thats a lot of pennies to be sitting around but they intend to cash them in for the price of the metal when they are allowed to. I hear its a pretty good rate of return if copper prices hold.
I fear paper cuts far more than firearms.