The SEC lawsuit against Binance has caused a major market crash, especially hitting BNB hard. It's worrying, and the future of BNB looks uncertain unless a solution is found. It remains to be seen if governments will have the upper hand in the crypto world.
The lawsuit definitely showed its effect on the market since Bitcoin and every cryptocurrency started dropping right after the news started spreading across different social media platforms and online news portals. As you mentioned some tokens are affected more than others including BNB which has faced significant drops since SEC has announced that they will take Binance to court.
There are also some other bad news circulating in the industry which are causing the market to crash as well but because they are not as big as Binance and Coinbase being sued for some of their services. However, we will soon recover from that too.