There's truly nothing wrong with writing a book, a guide, or any investment material as long as the writer is honest with his/her audience. There's also nothing wrong with shilling referral links as long as the person doesn't "market" himself like he did in this screenshot. Haha.
Twitter is starting to include "for context" information in tweets.
If there is anything new I find interesting about Twitter/X, it's going to be context information to stop the lies they spread on that platform. A boy of your age or less than your age will wake up.and decide to post fake information just to belittle your effort or make you feel less of what you have achieved in life, no wonder they say traders who boast are not really traders, they have one or two things they do that they don't share to the public; in crypto for instance, they shill coins to newbies using their influence and sell at the top.
Trading lies in the experience than the book, I have used more of time in practicing trading than reading the chunk of PDF's ebooks I have on my phone, I get it fast when I do it myself but using experimental virtual money, not my funds but they are all in real time which make it so real but the difference is only the funds, the loss and the profits are not yours but it's worth the experience than reading the books.