Now why would someone in China decide to drop so much BTC on sunday is another question
To make money off of the poor trading decisions made by others.
Doesn't make much sense to me. If that person tried to manipulate the market i think he lost out. Plus why would a whale even try to manipulate BTC at this point when it's so much easier and much higher chance of success of doing that with LTC? There's enough volume to discourage manipulation of BTC now think we already observed few "wales" getting their ass smacked trying to do something similar.
Why are we assuming that this was a whale and not simply sell pressure that was unsupported by buying action since the fiat system is closed down for the weekend?