It looks like an attempt to sell just to make Bitcoin prices lower.
I wonder why they did not just do that. At one point it cost only around 200 BTC to break 115.
It's people cashing out. Not rebuying. Not a good sign.
What? Dumping thousands of coins in one market order is possibly the WORST way to cash out in existence. All signs point to "NOT people cashing out."
So what makes you say, with such certainty, "It's people cashing out." Stupidity? Ignorance? Thinking that dumping thousands of coins in one market order and experiencing slippage 2 DA MAX is the
best way to cash out rather than the
worst?
EDIT: And no, the fact that they did not instantly rebuy all $2.5 million worth of coins and bring price back up to 125+ does not definitively mean they are cashing out. That's not how this game works.

You forgot one thing. They did it in the middle of the night on a WEEKEND.
Great test...