These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Family-Unfriendly Aesop - The moral of the story seems to be that you should totally give away something that has a lot of worth for something that seems worthless, because it'll always pay off by giving you immense wealth.