Manipulating bitcoin price is easily possible & Controled by big fish Trades, whales & holders. If we notice bitcoin chart from January 2017 to till 2020, Eerywhere  indicates manupulation. After making market bullish, they told us a fairy story that bitcoin is illegal. Can be stolen by hackers, Reasons for money laundering and so ban by usa, china, india or bla bla bla. Then people sell their hodling share to save theirs balance and thus market drops.
 Then Big fish buy bitcoin with low price & start saying that:: bitcoin have a great future. Will hit $100k this year, will hit $1M soon etc etc and makes us crazy to investment in bitcoin  again. So Pump-dump Pump-dump is going on & on and they make profit from It(Us). Small traders like us, are in loss after all.  I hope soon some celebrety will have revails about how much bitcoin they have & tell us to buy bitcoin so that bitcoin will hit $20k soon as 2017 and then.....