1. In many tech area: networks effects and zero marginal costs creates winner(s) take all. In that sense it make sense to follow the winners as previously investors underestimated how big winner could be (e.g. Amazon, Google, Facebook, Apple).
2. Everywhere else: betting on underdogs that are mispriced is much better strategy in long-run. See Warren Buffet got huge returns by looking at fundamentals, but his strategy would not work well in tech.