PM at meh company but cool industry vs. CEO at startup

I have an offer for a PM job in a not-so-great company, but the job is in a specific domain I am interested in (providing hardware for machine vision, autonomous vehicles, etc.). I also got approached about running a startup that will do some very boring stuff to bring in capital, but some potentially tremendous things in the future.

If I take the regular PM job, I get to learn a particular industry and grow a network with customers, partners, etc. The startup job is with a group that already had a successful exit in the past, they can pay a salary, and the attractiveness there is to learn from these folks about starting and running companies, raising capital, etc., and I grow a network of people in that type of ecosystem.