Yes surely dump is basically a trading technique people wait for the price to sky rocket and when they think profit is sufficient they sell , because of this the price falls and then 70% of the people who sold wait for the price to go super low and then buy again. We will surely see more dump in future as dump create profit for many which in return kind of forces them to say with bitcoin. If the price is continuously growing only a really big dump can occur which can lead to bitcoin even being dead.