I would use https://www.bls.gov/ooh/fastest-growing.htm and https://www.bls.gov/ooh/highest-paying.htm as a starting point, and see if the kid is willing to pursue training to prepare him/her for that occupation.

One thing that should be emphasized to children is the necessity to earn a decent livelihood with a job that leaves them enough time to pursue their other interests. It is important to do something remunerative, but also balance it with occupational outlook and individual interests. Of course, individual interests can and do change over time, so they should be taken with a pinch of salt, particularly as a 16-year old.