I try to circulate JFKs. When I get a few rolls, I keep the ones I want and spend the rest. I see no reason to NOT circulate them. The half dollar used to be a circulated coin. I saw them every once in a while when I was a kid (that's one reason why I collect Franklins). When the JFKs came out in 1964, people started hoarding them, that's why there are so many MS-grade 64s out there. After halves became copper-nickel clad in 1971, the half dollar became pretty much doomed and it made the quarter the workhorse that it has become.
When I was a kid my dad literally hated half dollars. When I say hated i don't mean just didn't like. He literally hated having that heavy coin in his pocket. I recall him getting a silver half once and was raising hell. And my grandma was that's silver you're supposed to save that. I don't believe he'd have cared if it was gold honestly. I have seen him hold up the line refusing to take a half. He'd take 5 dimes first lol.
According to the website Coinflation.com, the value of the metal in the current half dollar is 11 cents ($0.1145975) and the metal value of the small golden dollar is 7 cents ($0.0719331).