The U.S. did not issue any gold coins honoring JFK.
If you have a half dollar with that date, it's an ordinary coin that's been plated for use in jewelry or sale as a "collectible". In any case it's only worth 50 cents.
If it's from Another Country, please post a new question with that information.
A 1968 Kennedy half dollar is composed of 40% silver and has a current approximate value of around $5-6 in circulated condition. However, if it is in mint state condition, it could be worth more to a collector.
The value of a thermal color enhanced 1996 Kennedy Half Dollar varies depending on its condition and the demand from collectors. Generally, these types of coins do not carry a significant premium over their face value unless they are in exceptional condition or have unique colorations. It is recommended to have the coin evaluated by a professional coin dealer or appraiser to determine its specific value.
The usual advice when someone suggests cleaning a coin is to say NO, NEVER! because cleaning destroys a coin's collectible value. But 1967 Kennedy halves are valuable only for the small amount (40%) of silver they contain, so if you want to use a product like Tarn-X or similar, you won't harm its metal value. The coins are still common among collectors so the chances that you could sell it for more than its metal value are extremely low.
Four quarters! HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA!
There are two dollar coins that it might be, both share identical reverses. There is the Eisenhower dollar (dated 1971-1978) and the Susan B Anthony dollar ( dated 1979-1999). Unless the coin was found in proof condition or in a mint set, most likely it is only worth $1. Other than a few Eisenhower dollars with an "S" mintmark which are 40% silver, the coins do not contain any precious metal content.
With the date of 1979 the coin is a Kennedy half dollar, it's worth 50 cents.
A US half dollar with a date of 1979 is a Kennedy half dollar not a liberty half dollar. The coin has no silver and is only face value.
The coin is still in circulation and only a dollar.
The coin is a 1979 SBA dollar and it's NOT silver. The coin is still found in circulation and is just a dollar.
50¢ Please look at the back of the coin. It's a HALF dollar. It's also made of copper-nickel, not silver.
Kennedy is on the US half dollar (50 cent) coin and Lincoln is on the penny (1 cent) coin.
The 1979-D Susan B. Anthony dollar is still in circulation today, the coin is face value.
.50
One dollar.
No such coin. Kennedy is only on the half dollars. Starting In 1971, the dollar coins are Eisenhower dollars. The coin is just face value.
The coin is not a silver liberty dollar. It's a 1979 Susan B. Anthony Dollar coin and has no silver in it and the value is one dollar.
Check that coin again. Kennedy wasn't put on the half dollar until 1964.