As we can see bitcoin and cryptocoins price is always go up and down, and is better to see as it is and why not make a profit when this happens. I think there is manipulation and also some people are scared when they see the price goes down, and sell coins even if there not was manipulation, but yes sometimes manipulation is on the way.
indeed, market price manipulation of cryptocurrency is very real so we can feel the impact on market price movements. the amount of competition in this business so that many people who have large capital can easily manipulate market price movements to be able to get greater profits