source - data gathered from binance public API. they give info about trades, amounts.
just get this data and make simple calculations
delta = (amount of btc that was sold on exchange) - (amount of btc that was bought on exchange)
this delta for this period = about 100 000 btc
but price at this time period was moved from 7300 down to 3900 and later up to 6800
so result price move is only about $500 per btc
so some groups of people take these btc and payed about 600 mln usd for them, and at result keep prices
I am very curious - what groups could make this and why
Why do you think that it was "someone"? Maybe those groups of people are normal investors who aren't teamed up in any way.
There's more rich people in the world than you might think. People that can throw away a million dollars here and there to buy a nice car for a lover or an apartment in a place they visit once a year.
If 100 thousand people bought bitcoins worth 600 million dollars is this such a big deal?
You should rather focus on another question. Who supplied them with so many bitcoins? Are long term holders selling at these low prices?
Who could afford to sell this much for 6000 dollars when the price was at 10 thousand since January? Are so many investors selling at a loss?