Unfortunately, all investors have to be nervous because of market changes. It just so happened that this is a very stressful occupation and you need to be ready to take risks. But in the long run, you can make big profits if you know what you are doing.
Most of those who are nervous are short term investors who make very small investments, because big investors are investing for the long term, I think very few of them are nervous when they see the current market conditions.
Because their goal is for the long term and so they don't really care about current conditions as long as they can still buy more at the lowest price. So the only ones who are nervous are those who don't understand the risks and those who use little money because if they lose, they find it difficult to find other money to make another investment.
The ex-management of FTX was accused of concealing the illegal use of client funds.