Metal coins, if they must exist (questionable), should not be ferromagnetic. Look, I love iron as much as the next guy. When alloyed with carbon and other elements, it allows for the greatest feats of engineering this world has ever seen. Additionally, it helps ferry oxygen around my body. Very cool. But declaring that a coin that weighs 0.015 lbs, when iron trades at well under a dollar per lb, is worth $2 is fucking ludicrous. The small quantities of other metals present do not impress me.