I personally don't feel comfortable disclosing my earnings. For me, it's about long term thinking. Similar to medium, an article can take you time to write and that time is your cost. However, the potential to earn income is unlimited as it may pick up traffic later on and gain earnings. It's the same way to Youtube, with proper SEO and a defined audience I believe you can have an unlimited earning potential so long as your consistent. I wouldn't know the earnings potential for you or anyone as there are other factors to consider that contribute to the income.