[erik14th]

I like Musk's take: "work on the most important thing".[0]

If money is enough to drive you, try to find out which is more profitable should do it, but being useful and good to people and mankind in general is an added bonus and motivation.

[0]https://www.youtube.com/watch?v=ycJeht-Mfus

[chatmasta]

But don't forget Musk worked on X.com/PayPal before he ever worried about the "mankind" side of things. It's a long life, hopefully. Take your time.