The most valuable & worthwhile thing you can do is self development because the world can't take from you who you are. If you learn a skill you can lose a job and still be okay because you have the skill to bring somewhere else. If you learn how to manage time or money or relationships you can lose time and money and relationships & still be okay because you have the skill to organise, plan, rebuild & recreate with people, places and things that are maybe even better for you. Listen this Podcast to know more.