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.
That is what trader do. Buy low, sell high. They don't really care about nothing but profit.
That is what trader do, if they don't do that they will not earn a profit. You don't need to blame these traders since that is their job, you have a job, you do it. Why will they sell at low and buy at high? That will not generate them any profit. They don't really care about anything since that is the nature of our world, survival of the fittest.