Problem is these circles are dynamic and often unknown. What you’re good at depends on how much you know, practice, and inherent talent. First two changes over

Problem is these circles are dynamic and often unknown. What you’re good at depends on how much you know, practice, and inherent talent. First two changes over time, third one is an unknown variable. You also don’t know when you should give up. Should Einstein have given up science after he couldn’t get a faculty job and had to work in the patent office? Things that pay well depends on economic situations that can change dramatically. See the cryptocurrency world. Things you enjoy doing also change. Many stories here show that making a career doing things you enjoy can suck the enjoyment out of it.