Does Rumpelstiltskin fairy tale have a moral? Is there a moral to any fairy tale? When Aesop wrote his tales, he usually stated the moral at the end.(See https://www.all-about-fairies.com/aesopshepherddog.html)
What is the moral of Rumpelstiltskin fairy tale? Maybe it doesn't have one.
I will try and list the main points from a synopsis and comment on the possibility of how that might be the moral.
Once there was a miller who was poor, but who had a beautiful daughter. Now it happened that he had to go and speak to the king, and in order to make himself appear important he said to him, "I have a daughter who can spin straw into gold."
The king said to the miller, "That is an art which pleases me well, if your daughter is as clever as you say, bring her to-morrow to my palace, and I will put her to the test."
And when the girl was brought to him he took her into a room which was quite full of straw, gave her a spinning-wheel and a reel, and said, "Now set to work, and if by to-morrow morning early you have not spun this straw into gold during the night, you must die."
Thereupon he himself locked up the room, and left her in it alone. So there sat the poor miller's daughter, and for the life of her could not tell what to do, she had no idea how straw could be spun into gold, and she grew more and more frightened, until at last she began to weep.
But all at once the door opened, and in came a strange little man she did not know. His name was Rumpelstiltskin. He said, "Good evening, mistress miller, why are you crying so?"
"Alas," answered the girl, "I have to spin straw into gold, and I do not know how to do it."
"What will you give me," said the manikin, "if I do it for you?" "My necklace," said the girl.
Rumpelstiltskin took the necklace, seated himself in front of the wheel, and whirr, whirr, whirr, three turns, and the reel was full, then he put another on, and whirr, whirr, whirr, three times round, and the second was full too. And so it went on until the morning, when all the straw was spun, and all the reels were full of gold.
By daybreak the king was already there, and when he saw the gold he was astonished and delighted, but his heart became only more greedy. He had the miller's daughter taken into another room full of straw, which was much larger, and commanded her to spin that also in one night if she valued her life.