Let's face it Bitcoin cash failed. There is more derision and bitterness in that space now than a year ago. The two chains abc and sv are low grade networks dominated by the personalities of Roger (who happily vouched for Mt gox) and Craig who is playing a very week con.
On top of that both chains are dominated by what can only be described as mining cartels. And one such cartel holds over 1million tokens of both chains. I don't think it's possible for the market to absorb those coins without pushing down massively. It's a bigger smoking gun than a potential tether scandal.