The core point of the article is that the author gained a good income through cryptocurrency in September and is optimistic about the future. The article lists his earnings on different platforms and states that although some trading points were not very good, he is generally satisfied with his income. He plans to reinvest part of the earnings to earn more before the end of the year, aiming to realize his dream of quitting his job to travel. The entire article reveals the author's positive attitude and optimistic expectations towards cryptocurrency.