It is normal when prices go down buy a little more. It's pure common sense.
The total value of all cryptocurrencies has dropped 11 percent since Saturday, declining from a high of nearly $180 billion to under $160 billion today ...
When people panic and start selling, they are going to come in quietly and start buying again. So it's buying 50,000 then dumping 20,000, for example ...
They are trying to shake people out of the trade – so that they can get their hands on more bitcoin at lower prices.