The other answers in this thread are good. FYI, if you ever go anywhere near the Federal Reserve Bank in Dallas, stop for lunch at Sammy's, the barbecue place next door. They always, and I mean always, give out half dollars in change if the amount of change calls for it. They may be the last place I know, other than the occasional casino, that does this. Otherwise, I see the various types of small dollars in circulation a lot more than I see halves.
These responses are not helping me. I thought it was a slam dunk. Me thinks I will hold on to them mainly since they are not so common in circulation and that only gets better (more scarce) for the long term.
What's not helping you? All sorts of perspectives are what you got with an open ended thread, for which there are several factors to consider. Just because halves don't circulate much doesn't mean they are getting more scarce. They are simply unpopular with people and are sitting in bank and Federal Reserve vaults, just like dollar coins and others. Just watch the regular availability of $1000 boxes being ordered up by the Roll-searchers. Monitor their results and you will find that they send back far more common clad halves than they cull in silver or silver-clad halves, and they continue receiving boxes to search. They are reporting in to that thread from across the country, halves are not scarce. Maybe the best thing you should consider doing is getting in on the half dollar silver content search, you can put all your common clad halves to work, invested towards acquiring a $1,000 box of halves and starting the cycle. It's bound to pay off a little and provide some entertainment hours roll searching. You may even find some Franklins, Walkers or classic commemorative 90% silver halves in the process. Eventually, the intrinsic value of the metal you harvest is going to surpass the face value of your common clad halves you are clinging onto and you could always cash in the silver to buy high grade clad halves if you end up liking them.
texmech, I'm inclined to agree with krispy...this thread seems to me it would have been more helpful. There's been details about mintages, explanations of NIFC years, discussion of the key coins in the Kennedy half dollar set, talk about grading, and discussion of their circulation. All of these things make up the nature of collecting a particular type of coin..or not. And heck..if none of that does anything for ya, why not just...oh..I dunno...collect what you like! If you're looking for a specific answer, all any of us can offer is an opinion. personally, I don't hold them, beyond what I've described above. I don't think there's any reason to expect them to become more desirable or harder to find than they already are. Beyond waiting a century or more (at which point it won't matter to us anyway *heh*) there just doesn't seem to be anything pressuring their value to climb. Having said that, I must again agree with krispy...the roll searching is a HECK of a lot of fun. I've had everything from 3 solid ROLLS of silver (including franklins and walkers) all the way down to an entire box that was a dead blank. Having said that, however, I'll repeat what i said before...this thread HAS identified those Kennedy halves that have SOME premium (either for bullion or rarity) and "desirable" coins seem to crop up more often in Kennedy rolls than any other coin. So hey...I'd say to keep a roll or two of real high end coins just for grins, maybe hang on to a roll of the Bicens if you think maybe some kids might like em down the road, and if you like the Kennedy half, then start a set, and go roll searching! Beyond that? meh. Spend em. It's always fun to hear the comments from some of the more clueless in the retail world.