It's a transfer, not a buyout. And besides, this purchase is not indicative of what most of you may call as "shaking of the weak hands". It's pretty much just bitcoin being transferred to a coinbase wallet/exchange for all we know. Plus, miners do this on the daily, though not in grand amounts like this, to avoid suspicion, so what makes this situation different from what the miners do on their lunch breaks?
It is obvious that person never knows about it and for sure, he never understands those trading charts and ends up shaking his hands and his head. That might he is panic now and that wanted others to do the same...Hmmm, OP is wanted to make us fool.
Anyway, I have to take some break out from the negative mind, even seeing huge transfer makes their mind think about dumps. That only they understand, dump and pump, but they never know how to give trust to Bitcoin's capability.