Pot of Gold at the End of the Rainbow

Hello everyone. This question is in my mind for so many years. I know that it is just a magical story but now, I just realized why is it that many think that there's a pot of gold at the end of the rainbow. We need not to think of it as if physically. That saying just means that there's a reward for us waiting for after our long journey in life. The pot of gold is the reward and the journey of life is the rainbow. I was really happy that I heard it from a person I like. She gave me an idea about it that's why I've came up with that. What about you? What's your idea about it?