What @haejin does by looking at charts to predict prices is called 'chartism' and it's not without its criticisms with some experts calling it 'a form of financial astrology'. Chartism is guided by the philosophy of "history repeats itself" which is never a safe bet in mature markets. Most all crypto currency has gone up and almost anyone invested has made money whether they follow @haejin advice or not.
Maybe @haejin doesn't deserve so many followers because we think he has low-quality posts but he seems to be going about his posting honestly. Hopefully any changes to Steemit would encourage higher quality posts more than punishing lower quality posts.