very good points. But can you imagine, if what you do in the real world is like selling, teaching, singing in a cafe or making song lyrics. Everything can produce crypto as long as you want to be paid with crypto as payment. I made song lyrics for some friends and I wanted to pay with crypto and he agreed. Isn't that also included as a way to earn crypto?.
Yes, you find your own unique niche, this way is the most potential. Doing some work according to our passion then looking for opportunities to connect it to be able to earn crypto, in short: work for crypto. If you are a content creator, take advantage of your creativity and ability to promote a project, get the best rewards for the best effort.