If you really want to invest in copper - there's a far easier way. Buy a Ryedale sorter and get boxes of pennies from the bank. Run them through the sorter. Take the zinc pennies back to the bank, get more boxes. Rinse and repeat over and over.
In 1982 the composition of pennies changed from 95% copper/5% zinc to 97.5% zinc/2.5% copper. Stack up the 95% copper pennies until you run out of room. Looked at from a bullion perspective, $100 of copper pennies is worth $223.52 at the current spot price of copper
1909-1982 Lincoln Copper Penny Melt Value - Coinflation As a bonus, if the price of copper craters - you still have $100. The only way to lose is through inflation (and then, the bullion price would be higher than the face value anyway).
And if you don't want to stockpile it for yourself, sell it on
eBay. There's plenty of people buying copper pennies for around twice face value right now.
Just don't try to melt it, or ship it out of the country for melting. That's highly illegal.
An even easier way is to just buy boxes of nickels from the bank. No sorting necessary. They're 75% copper and 25% nickel. Each one is currently worth slightly less than a nickel, but when (if) copper prices go back up, they'll be worth more as bullion than face value - just like the pennies. Of course, they're illegal to melt or export as well.
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