A form of price manipulation is buy walls and sell walls done by a handful of individuals with massive holdings, known as whales. once you hear that cryptocurrency markets are volatile, then remember that there are many factors affecting it other than walls, what are the other causes you know?
I agree, buy walls and sell walls are the basic or the simplest form of manipulation in this market, however most of the manipulations by big players are FUD, fake and negative news they constantly release in the public to scare investors, mostly the newbies to sell their holdings so these individuals catch the dips and accumulate as much of their holdings.