I think no one can tell you what to do if you want to make a profitable enterprise from it. My hypothesis is you can earn from any thing if you are willing to p

I think no one can tell you what to do if you want to make a profitable enterprise from it. My hypothesis is you can earn from any thing if you are willing to put enough effort. The way to not stop working on idea is to choose something you really care about and what can motivate you to pursue your goal even if you can't see any returns from it. For me it was a pain to learn English and to remember all new fancy words I met reading books. As I'm a software engineer my software standards are quite hight and it was hard to find what I want, so I had decided to build my own solution (https://vocab10k.com https://vocab10k.com). Also, you can pick any stack you want :)