With bidens plan for 'green energy' this puts Silver in the cross hairs of solar panels and other electricity conducting energy apparatuses. Thus buying actual silver coins, jewelry and other thins containing silver can become quite cost effective. Take $500 and go to your local bank and get a roll of $.50 pieces and look for coins made before 1965 take the coin out and replace it with another $.50 coin and you just made $24.00. ...........What US coins are 40% silver? Between the years 1965 and 1976, two major U.S. coins contained 40% silver. The term “40% silver” is a short way for investors, collectors, and buyers to refer to Kennedy Half-Dollars minted 1965–1970, and 1976, as well as Eisenhower Silver Dollars minted in the years 1971-1974, and 1976.