In an interview with Forbes magazine, Sam Bankman-Fried mentioned that there are smaller exchanges that are now secretly insolvent. He did not mention specific exchanges, however, there is someone on Twitter who said that there are rumors that Kucoin will halt withdrawals in the near future.
He is just trying to make better deal because he is trying to purchase other small crypto companies and expand his reach, especially after their deal with Celsius is gone bust.
I don't think this has any connection with Kucoin that is one of the biggest crypto exchanges in the world, but I would still not keep any coins on Kucoin, FTX or any other centralized exchanges.
If you are not big time trader, than se exchanges only for trading, and non-custodial wallets for holding your coins.
Why is your portfolio on an exchange at all? The only coins which should be anywhere other than your own wallet are coins which are being actively traded.
I have even better proposition.
Pretend like you don't have any portfolio and uninstall all portfolio tracking apps, especially during bear markets, and you will sleep much better