I appreciate your feedback, and you are right joyfulness is more superior to happiness, Joy is stronger and soulful, although I wouldn't pit them against each other. Joyfulness is more spiritual and internal, I guess why I choose to use happiness is because I was talking about an external material thing(money) and how it affects us. there is a direct relationship between money and happiness. so it was an easier topic to phrase.
If I was talking about something spiritual the perfect term would be Joy. Joyfulness is superior. we all want to be happy but joyfulness is the final destination 😊