In trading, one needs to follow the news a lot and learn to analyze, rather than rely on someone's forecasts to constantly get a good profit. For this, it is necessary to study the specifics of such activities well.
Analysis is what you need to do in trading. It's not just an educated guess but there is analysis on it, news from the people who are in the pump and dump group are also helpful. But I guess there are traders who are just depending with their fortune and luck that are just guessing on what alt coin will be pumping and what are goes those are good for short term profit and also for long term holdings.