Since there is no proof of fragments that whole topic should probably be avoided.
The stories about fragments can probably be explained as a mental phenomena. Caught up in the excitement of the find, every mucky bit a paperysomething turns into another bill. Agents not trained in archaeology (like, all of them), allow cross-contamination (top-of-the-hole stuff falls into the bottom of the hole) and everything gets sorted out later by the lab, which separates the junk from the money fragments, leaving the paltry little cases of fragments that Kaye showed us.
All the agents on the dig that I've spoken with report multiple fragments - Himmelsbach, Schroeder, and McPheters.
As far as I know, no one knows where the money fragments are now, nor do I know of any one who has seen the documentation on what was found and where.
Further, Brian told me that he and his family went looking for more money and found NOTHING.
Lastly, Al Fazio says contradictory things: first, he says that no money was found IN the sand, buried. "That's a lot of government crap," he told me.
But secondly, he told me that there were money fragments along the high tide line.
So what does this tell us? The FBI are lying? They're caught up in the frenzy of a Cooper find? - Kind of telling the truth but so excited they get mental, and confuse bits of paper detritus for ransom money?
Brian and the family were so excited with free-but-gooey-bundolas of six-grand that they got mental and couldn't find anything else?
Al got PTSD flashbacks working with the feds, who were driving him crazy and wouldn't let him enter his own property initially, so his comments are suspect?
Or it just proves the Tales of Chelm are true: Two Jews, three opinions. Then multiply that truism by 15(?) FBI agents and you get real load of government crap!
Maybe it's time to ask the Shin Bet* for a consult.
*Internal Security agency for Israel. When the Mossad needs to unstick sticky stuff they ask Shin Bet to do it.