asmok

When you are young, early 20s then you'll work hard on a few jobs to make money for the future. After you've save some money and have a steady & stable job, you'll wonder why work so hard to save all the money? At that point, you'll start to enjoy life and value your heath and people around you more.

It's just part of the many stages in life that a lot of people go through.  When you realize it, you move on to the next stage in life.