A few thoughts on this subject-
1)
STORAGE CONCERNS- I'm in the group of people who feel that storage space is a potential problem, and more so if you sort by date. Example: See EthanA's posting titled "Mega Pennies NE Indiana Hoard..~ 2 Million (Updated Info)" first posted on 12/13/14. Look at the photos- we're talking about perhaps 3 1/2 tons, but those shelves take up a LOT of space.
When someone becomes concerned about pennies taking up too much space, they can branch out into nickels. The problem for those of us in the U.S. not named Kyle Bass (Texas hedge fund guy who bought a million dollars worth of nickels a few years ago) is the nickels in the U.S. are only 25% nickel. Canadian nickels before 1982 were 99.9% nickel and would take less than half the storage space of pennies (at current market prices). The problem is in finding the Canadian nickels. Also nickel is a known carcinogen. So there are tradeoffs as always. Still, I wish I'd known about the Canadian nickels about 5-10 years ago- I'd probably have a nice hoard now. This is kind of like finding out about silver coins in the early 1970's (when most had already been picked from circulation).
2)
TRANSPORTABILITY- Space and weight pose another potential issue as well. Let's say you had only a few hours to move your penny hoard because of a flood coming your way. Would you be able to? I'd say many wouldn't, and those pennies sitting under water would get real ugly and corroded pretty quickly. Think about the coins which come out of fountains. The pennies get to looking pretty bad in a hurry. If someone had something perhaps on wheels with access to a forklift, then perhaps they would be ok even with floodwaters coming their way. Basement storage- I just don't know.
3)
ABILITY TO MELT PENNIES- Sure, we can't melt down the pennies now, but for those who can wait 5-10 years, there is probably a decent chance they will be able to melt them down. After all, you can legally melt down silver coins and war nickels in the U.S. For those who can't wait that long, perhaps they shouldn't own pennies. Back to the example above (the man from Indiana with a few million pennies)- it sounds like he may have health problems and doesn't want to wait that long. So he is probably doing the best thing by trying to sell his well organized hoard.
4)
HOBBY SATISFACTION- When I think of hobbies, I am often reminded of the old phrase "An idle mind is a devil's workshop." Even if a hobby doesn't pay for itself, it keeps you from wasting money on other things (i.e., shopping at the malls, gambling, etc.), keeps you from getting depressed, etc. As such, there is value in spending time on a hobby, especially for those with limited means who can't afford to buy boats, RV's and travel the world.
One other aspect of this, and I don't mean to be too much of a Debbie Downer. Let's say there was an emergency where we were without power for a week or two. No TV, internet or radio. Pennies (and coins in general) would be a nice diversion from the chaos going on outside.
5)
DECOY STATUS- If someone were trying to rob you at gunpoint (let's say a group of thugs performs a sneak attack and catches you sleeping in the middle of the night), copper pennies would be a nice decoy. In other words you could say "My coins are over here" and proceed to show them something that would be very difficult to move and not worth all that much. How many penny hoarders would have large stashes of gold and silver- probably not that many. If you have your copper or silver well hidden or stored elsewhere, then the pennies have served a purpose that you may not have considered.
Also, think about how the average person might think. Let's say you didn't know anything about coins and saw someone with a huge quantity of pennies. You first inclination might be to ask what they are worth. About 2-3 cents each. Then you might ask how the person got so many. If you say that you sort by hand (even if you own a sorting machine), then the other person will likely think you are both poor and/or eccentric. Tell them that you think that gold is too expensive and a "barbarous relic" with no real utility and you are even better off.
Sorry to ramble on so long. Excuse me while I tell my wife that the two $25 boxes of pennies under the Christmas tree will be moved by the end of the day...
Former stock broker w/ ~20 yrs. at one company. Spoke with 100k+ people and traded a lot (long, short, options, margin, extended hours, etc.).
NOTE: ANY stocks I discuss, no matter how compelling, carry risk- often
substantial. If not prepared to buy it multiple times in modest amounts without going overboard (assuming nothing really wrong with the company), you need to learn more about the market and managing risk. Also, please research covered calls (options) and selling short as well.