It is usually the whales who are doing things to frustrate cryptocurrencies.
The logic is easy, they dump at higher price, spread FUD, and then buy at lower price and repeat.
Since they have tons of money and Bitcoin, it is possible to play the market especially a lower cap coins.
All the big investors who have invested a huge amount of money into the world of crypto currency do this trick as they know that spreading the negativity and the frustration amongst the people will result in lot of chaos and that the people will go for panic selling which will then help them in buying more coins at much cheaper rates and that they will be able to have greater profit later.