If you are just going to buy stock based on idea that it's been going up lately and everyone is buying it, one day, you will find yourself selling when everybody is selling.
Like I said before, the only way to have an exceptional return here is by being on the opposite side of the crowd, and be right at the same time. If you follow the herd, don't expect to get exceptional returns. You would only produce average results. Because investing is zero-sum game, while someone is making money, someone out there is losing. And what makes you think that being just like everybody else (momentum investing) put you on the right side of the coin?