Is it worth being serious in Life ? No, because it only gives you stress which can cause many other problems. And there is no system even to measure your stress, so its You and only You, who can control that. Having fun has nothing to do with Age and Position, so keep steeming and have fun and Enjoy your Life.
Image Source : https://www.vanityfair.com/news/2010/08/the-barry-pranksters-the-practical-jokes-of-the-obama-administration