People who always like to buy the dip can't make big money. The essence of buying the dip is fear of highs, so once a stock rebounds to a certain extent, they'll sell, missing out on the main upward trend. Dip buyers tend to sell after a small rise during the main surge of a sector, then buy the dip again after a high-level drop, falling into a cycle of 'selling too early during the main surge and getting stuck while buying the dip.'