Aside that the story is heart touching, it has a lot of lessons one can learn from in the aspect of investment for future and also in the aspect of family affairs. The good thing here is that the man did not share that secret with his wife otherwise, he would have lost that too.
Women are dangerous creatures (sorry to say but that's just the truth) they turned children against their father especially when they are not in good term with each other. Very unfortunate that the children took after their mother and forsaken their own father.
This story, whether real or fabricated has shown the importance of saving for future as that's the only good thing you can do to help yourself.
To be more precise, humans are dangerous and unpredictable creatures, not only are women bad people and all men in the world are gentle and kind creatures. There are many cases of sons abandoning/killing their elderly parents just for money, or drug-addicted/gambling fathers selling their children...and according to reports, social evils are mostly caused by men. So to be fair, it's not a gender issue, everyone has their own personality and it depends on the person, there will be good people and bad people in any gender.
But yes, this story teaches us a lesson that anything can happen and we should have a backup plan and save for the future.