Sometimes many people try to manipulate the market and buy precious tokens cheap and selling high later.They intentionally cause fear and panic in the inexperienced members and take advantage to perpetrate their greed activities.
Obviously yes. I think this is exactly what the whales do. But for this, the investors have to hold a really great percentage of the entire holding so as to influence the price of the market. They invest a lot of amount in a particular cryptocurrency due to which the price rises. Then other people also start investing it and when the price reaches the peak they sell all their holdings which cause a major fall in the price and people start selling it, which further adds to the price fall.