My interests are like that other meme that got shared here recently, lol. I'm a jack of many, many trades, and I can't ever seem to complete projects I start, though I am trying more now.
For people like me, being stuck monetising a single interest strikes this deep sense of unease in me. I've been working a few years now, and I've decided to stick to something I'm not passionate about, but I can do the job to my abilities and put a lid on at the end of the day.
Anything else would probably consume my thoughts and leave me feeling mentally exhausted. It's like task paralysis, but worse.