Anything is possible, but : To be fair (and to be in keeping my my kill-joy namesake ) : I've also gone on a few commissioned posse-hunts in my 45 yrs. of md'ing, where the following scenario plays out :
A family (the next of kin, etc...) will spin a story of how certain they are of a buried treasure. And, at first blush, who can argue with it, eh ? I mean, shucks, they're the children of said-individual, eh ? And there's anecdotal clues that are salacious, eh ? And at this point it's easy to overlook (and simply not hear) anything that could hint otherwise.
But in one such instance, one of the children casually mentioned that a year or so before their father's death, he had inexplicably bought a brand-new car for his favorite grand-daughter's high school graduation present. And when pressing that daughter carefully, it dawned on her that ... she never really gave thought to where her father had gotten that $$ from. I said : "Isn't it possible that he fetched his cache, cashed in his silver (or gold or whatever it was) to buy that ? " To which she came to the realization that ... yes ..... that makes sense.
Thus it really WASN'T necessarily a case of "unaccounted for wealth". And there WAS INDEED things (purchases before death) that could have been the case. Still though, the family was convinced dad buried stuff under the house crawl space. So I went down and detected for an hour, on my belly, crawling around. Found an empty metal container buried just a few inches deep. Had nothing but a few receipts in it, but nothing of value. We all agreed that this must have been the stash that they suspected . But that : It was retrieved and used before their dad's death.
Point of this ^ ^ story being, that at first blush (without hard- kill-joy-question scrutiny), I would have been swept up in the initial treasure-frenzy certainty. It's not just us md'rs and TH'rs that are prone to this , it's also the persons who opine of treasure on their land. They too are only hearing (and subconsciously embellishing) the salacious positive portions. And subconsciously dismissing and forgetting the amending & corrective & "more plausible explanation" portions.
Not that I wouldn't still do commissioned hunts. But just saying : Not every cache story is rock-solid.