As we all know that the market wave is unpredictable. At times the market might rise and at time it might fall, so with my own view I think it doesn't matter if you follow the wave while trading and it can give benefits because the wave will determine the market direction.
Sometimes the big players collaborate and then either buy or sell the coins at the same time and create some sort of the wave in the market. Though not every time this is possible but yes sometimes many people can fall in the trap and as a result seeing the opportunity may buy/sell accordingly and the result could be that they may become the part of the trap and lose their money or else have to hold their coins for the longer period of time.