The risks of nickel stacking by Funk & Wagnalls 1. Your $100 box is just sitting there earning no interest.
2. Your $100 is just sitting there and not being used to purchase another item, any item, which could be sold for a profit.
3. When the current nickel is replaced by something of lesser value, the melt ban will be lifted and many hoarders will rush to cash in, driving prices down. (How far down cannot be forecasted accurately at this time.) Waiting for the price of nickel to rise again before selling the $100 box is a risk similar to numbers 1 & 2 above.
4. In a moment of reckless abandon, while enjoying your favorite adult beverage at your favorite watering hole, you tell the cute, young thing next to you that you have more nickels than common sense. When you go to the bathroom, she tells Bruno, who has been watching his girlfriend get friendly with you while comfortably seated over there in the dark corner booth. You go home that night unwaware that Bruno and the aforementioned cute young thing are following you. Next day, while at work, your Chihuahua fails to stop Bruno from relieving you of your stash. Although your hidden theft prevention camera captures several clear images of Bruno, the local constabulary quickly slip the file into the unsolvable drawer because the chief recognizes his low-life brother-in-law and remembers the tail-chewing he got from his older sister the last time he tried arresting Bruno.
When in the Course of human events it becomes necessary for one people to dissolve the political bands which have connected them with another and to assume among the powers of the earth, the separate and equal station to which the Laws of Nature and of Nature's God entitle them... (Thomas Jefferson)