The world wide increase in silver prices was the main reason.
Inflation caused the silver content of coins to be worth more than their face value so the US mint stopped making silver coins for circulation.
The last 90% silver half's made for general circulation were in 1964. 40% silver coins were issued until 1970.
The last year for silver silver dollars was 1935. There were no dollar coins minted again until 1971, by which time silver coinage had been replaced with copper and nickel.
The last year for silver dimes and quarters, as well as 90% half dollars was 1964. Halves 1965-70 were then 40% silver. All dimes and quarters 1965-present and half dollars 1971-present are copper and nickel.
"They" have not stopped making 20 cent coins.
In the 1960's, the US stopped making silver coins because of the value of the metal. For example, a silver dime's silver value is worth $2 and a silver quarter is $6. Silver dollars are worth $30. The U.S. was wasting a lot of money in silver coins and the silver value was rapidly increasing, so they had to stop. Another reason would be that people took the coins, melted it and sold it to a cash-for-gold type company. Also, they would ship or smuggle them to foreign countries which is illegal.
After the Bank Holding Company Act of 1970 was passed, silver was no longer used in making half-dollar and dollar coins meant for general circulation. Some coins made for collectors may still have silver content.
i don't know maybe they hate silver. lol
1964
The value of silver rose so the US had to use other metals to make coins. If our coins were still made of silver dimes would be worth $2 and quarters would be worth $5.
1964 all us coins stopped being produced with silver.