There was huge ponzi scheme called PlusToken in Asia which got 3 billions USD worth of cryptocurrency in Bitcoin and Ethereum. When they starte selling the price started dumping. Now yesterday they went for another selling batch.
Worth to note that there are also copies of this ponzi (all those ponzies are called superwallets) that also made some millions but nothing close to the original PlusToken and some of them ie CloudToken are also dumping now.
We got Chainalysis report now where they track coins from the scam and noticed they are the ones sold. And due when you have 3 billions you dont care of the price, you just dump.
It is not easy to dump 2-3 billion worth of crypto as exchanges try to block those so here is a chart of how they dumped some.
They still have 20,000 Bitcoin left to dump.
Whole report here - https://blog.chainalysis.com/reports/plustoken-scam-bitcoin-price
Price below McAfee bet.