Moon samples like rocks and dust are highly valuable and sought after and impossible to get legally as a private individual, because of the fact that USA owns all of the samples in existence, from the Apollo program(A lawsuit about a certain vial of moon-dust[last picture] from Neil Armstrong comes to mind).
Some moon-rocks show in auctions from time to time, and most of the time it is a scam or a meteorite, but sometimes its a legit sample stolen from somewhere, because USA has sent and given many rocks and dust to other countries. But legit samples are unicorn rare.
So, I was thinking can there be a company that does sample return missions and sells lunar material to museums, jewelers and such interested parties. After all, the rockets required are soon to be available(SpaceX super heavy, New Glenn, the SLS, etc.), there are landers that are being developed (talking about the Artemis Program landers - blue moon, and the spacex's and the other one)
P.S. There is a marijuana strain called moon-rocks that you might come across if you search for "moon rocks" google, and it looks the part too, which is something :)