I do both ways. Following the hype isn't a bad thing to make a quick profit. remember, only for short trades. after to sell immediately, and you only have a little time. but it all also depends on the selected asset. trading with hype, obviously it's risky, must be very focused not to lose momentum.
to be on the safe side, buying while in correction is the choice. I do it for top market assets that I plan on long-term.