Yup, fund managers and billionaires can control and i believe exchange site / owners / CEO? that promote their own coins, like Binance BnB / QLC / WPR?
they can pump these coins anytime they like. so its is more like of a timing i guess if a person is a day trader.
im not good in trading

just sharing some of my thoughts.

Malaki talaga ang epekto ng mga bitcoin holders lalo na yong mga big whales na tinatawag kadalasan sila ang mga dahilan kung bakit bumababa ng mataas ang bitcoin, then after bumaba at magpanic ng mga tao bigla silang bibili ulet lalo na kapag nakita nila na bumaba na ang value ng bitcoin, in fact minamanupilate nila ang price.