well first we don't even know James-Youngers had anything to do with the KGC
second still doesn't explain why the people who buried it, if Frank and Cole, hid it why wouldn't they recover it
and third if one believes it was for KGC why wouldn't they recover it
and fourth there's little evidence the KGC had any real power at all, they certainly didn't provide much of a uprising during Prices raid nor has any mysterious 2nd confederacy attempt occurred.
Perhaps the KGC are aliens...……..or connected to MOMO and the sasquatch