In order to gain profit from one of the most volatile markets in the world, we need to find a way to predict what will happen in the near future. Most people (including myself) turn to online predictions to know which coins are good for investment and which time is right for buying or selling. When I search the web for price predictions, I face with so many websites and so many expert views about each coin. Some of them even claim they know what will happen the next day. The main problem is the diversity of the prices they claim. This diversity shows that some of them are wrong and some are true. How can we tell if a prediction is more reliable than others? You know what will happen if you trade based on false predictions. The risk of losing is high.