Which way is the job market going and what skills should one build to be in demand a few years from now?
In my experience, the unique skillset required to be a successful entrepreneur isn't something which can be learned through working a variety of jobs as you've described. Yes, it's true that an entrepreneur needs skills in all of these areas- but HOW MUCH and in WHAT CAPACITY is something that only other entrepreneurs can really teach you. Sometimes having a generalist's understanding of a particular area is enough to make meaningful progress, while in other situations your particular niche might require a "deep dive" to really become an expert. I've spent over 10 years creating businesses and making many missteps along the way (let's call them learning experiences!) and the most valuable lessons I've learned have come from more successful entrepreneurs who were willing to listen to my challenges and offer their perspective and wisdom. My advice would be to gain a mentor like this, learn as much as you can, and then start applying what you've learned towards a new endeavor ASAP. I wish you every success!