You are stacking 75% copper 25% US Nickels, right anon?
Nickels are currently worth 6 cents. There were times when they were worth 8-9 cents.
The best part is they will always have face value, so its an infinite money glitch. Even if copper goes to 0, you can still cash them in for 5 cents.
I just gained $20 in tangible wealth just by picking up 2000 nickels for $100.
A silver dime used to only be worth 10 cents, and now they are worth over $3.50.
The only negative is the mass of them for stacking.
A pre 1982 copper penny is worth 3 cents, but those are harder to acquire since you would have to dig through a bunch of rolls.
Nickels can be excellent barter currency one day for small $1 purchases since the smallest silver coin is now almost a $5 bill
The nickel and copper penny are the only real money in circulation, where the value of the coin is equal or greater to the denomination.