What second/side careers blend well with a physician assistant degree?

2 years out of pa school, 26 year old PA in private practice spine surgery NYC Pretty chill gig, pulling 130k base plus a likely possible 10-15k bonus/year

Anyways, over the past year I’ve been getting increasingly more focused on becoming financially independent.. paid off 85k of 170k loans so far.

I have an interest in the economics of business/ stock market/whether it be in medical business, or financial tech, I’m open minded. I thought about learning Spanish but I don’t think that’s going to make me more money compared to other time investments

I’m looking for some sort of avenue to focus on and get into. I only work 8-5 m-f and feel like I want to come home and work on something else to benefit my future / and I’m open to working on weekends.

I don’t wanna pick up shifts on weekends and make a measly wage, I’d rather invest that time into building a revenue stream or skill with a higher ROR

Thanks!