Whats a hobby/craft that you wouldn't expect that has an incredibly high ceiling either monetarily or in sheer skill?
For example, I'm sure the average joe doesn't know just how expensive calligraphy pens can be, or how deep the rabbit hole goes on video game speedruns.
It's not just money, it's not just skill that makes you a successful jumper.
It's a certain type of attitude and the ability to think when you've aimed yourself at a planet. Not everyone can do it. To be blunt, there is a large part of the population that shouldn't do it, because they have terrible decision making ability.
As far as money, I went through the student program in the mid 90's and it cost me about $1200, if I recall correctly. My first rig, used, was $4000. My second rig, new, was just over $8000. I have 4500 jumps most of which I paid ~ $20 each for. I don't want to do that math.
The best decision I can think of to make when someone asks me if I would like to jump out of a perfectly good airplane and plumet toward the ground at high speeds would be to say "No thanks."
Former skydiver here. The best response I ever heard to the "why would you jump out of a perfectly good airplane" question was, "you should see the planes we jump out of."