This is an archetype; appearing in some form in most cultures, long before there was any collaboration between them.
It is the great chaos, the unknown unknown with the capability to destroy Society. But it has this treasure! How odd is that?
The hobbi’ts Smaug had a mountain of treasure. St George’s Dragon had a virgin. Harry Potter’s Basilisk had Ginny (Virginia). The various dragons of Oriental lore had gifts of wisdom or power to bestow. The Serpent of Genesis boasted the treasure of becoming as unto God.
(And then various Heroes appeared and did their thing).
So what do you think? Why does the Archetypal Dragon of chaos have a treasure?
The smart ass answers are often amusing. But I’m hoping a few will actually put some thought into it to constructive discourse.