Which is better to learn, CNC Lathe or Medical Clamping? Which one is better in terms of salary and job prospects?

I think CNC lathe better, for the following reasons: you have to think from a long-term perspective, even if you become a hairdresser, or open their own barbershop, but also can not do a few years people are old, you see the barbershop in the hairdresser over 30 years old hairdresser? Very few! Even if you open a store, people look at your age, young people will not patronize you! Unless you make the store very big in those young years, you don't need to do it yourself, hire a hairdresser! And CNC is different, the longer you do, the higher the salary, people will honor you as a teacher! Now there are too many barbershops and too many people learning