I do kinda understand where you're coming from but I want to warn you against this approach. These jobs you mention, they DO exist. But they break people and make them intensely miserable. Look into "boreout" (as opposed to burnout) to learn more about this. You will be very happy for the first few months, being able to browse HN, news sites and Reddit all day while nobody cares about what you do, nobody wants your i…
"practically all passions and hobbies can be monetized somehow (even a little)" I disagree strongly. This is a dangerous advice. I've been watching this from the sidelines and yes, someone can get a trickle down that does not even buy you a cup of coffee. But revenue streams beyond that? Highly non-trivial, especially in the niche-hobbies (of which there seem to be an infinite amount of them). Not all things worth do…
However, I've seen people monetize the craziest things (and quite well at that). The more niche, the more money even. People pay good money for the most unbelievable things. The biggest issue is more likely to be market inefficiencies, i.e. bringing buyers and sellers together. But I almost guarantee you that somewhere out there is someone willing to pay a ton of money for that one weird problem you can solve for him with your niche skill or interest.
Apart from the difficulties of finding that person or audience though, I'd be curious to hear what things you've been thinking of that are dangerous or impossible to monetize in a way that allows you to humanly subsist at least.