This is what often happens in the cryptocurrency market.
Sometimes you just see the price of the entire market going dip as a result of statement made by one influential person. Such persons are agents of FUD and yet you continue to reverend them because of their past or current achievements. They scare you to sell cheap to them, and later, they reverse their statement through someone else probably their cohorts, then the prices start to skyrocket again, then you start playing catch up to buy again even at prices far above what you sold to them. And the process goes on, starts all over again.
My friend! wise up and stop allowing someone to switch you off and on. You are not a toy robot.
Learn to stand your ground amid such manipulations or low market prices.
I doubt such things are still happening today. The crypto space is much mature now compared to a few years ago, people already have a better understanding what FUD is so a FUD statement, even if he's an influential person, won't affect the market in general. Sure this influential person can make a small group of people afraid, but he's surely not able to make the price dip, at least not in major markets like Bitcoin and Ethereum.
The possible scenario is pump and dump in very small marketcap coin. Just like what McAfee did in the past with his "Coin of the Day" agenda. Many people bought the particular coin, pumping the price, while I'm sure McAfee is selling on that pump. Geez people are so stupid. But still, with all his popularity, McAfee can't make any significant change to major markets.