I remember the quote of Bob Marley:

“Money is numbers and numbers never end. If it takes money to be happy, your search for happiness will never end.”

When I was a child, I love to play even if I'm alone playing. Now, I also love to play but with a responsibility to spend time to earn something. In my opinion its actually the balance of things that would be most difficult to master. How to moderate as much moderation as possible. When we're out of balance, especially the desire for money, we get lost.