I used to sort Wheat cents for my grandmother when I was a kid, I used to enjoy it. As for hoarding copper cents; if the
Lincoln Cent was eliminated from circulation, then it would be legal to melt the copper ones. Anyone who melts copper cents would definitely profit if the spot price remained the same or rose in value.
There is also a secondary market for these. Just check out completed auctions on
ebay. It is not uncommon to sell $50 worth of copper cents for $75. In my opinion hoarding copper cents is a win/win situation. If the spot price of copper drops, a cent will still be worth a cent.