If the information is true, it is very unfortunate for people who become victims of exchange hacks. In the future there will be another hack and a large amount of Bitcoin available on the exchange hacked by the perpetrator will disappear and people who have Bitcoin on the exchange will become victims again.

As long as we still use exchanges to store assets, as long as the hacking is successful and occurs every year, then our assets will be lost.
How to avoid losing assets due to hacking in various ways that hackers do, don't store Bitcoin and other assets on exchanges.
Bitcoins and other assets stored on exchanges belong to them, not to you.

There have been many reminders given by very experienced users but there are still many who don't pay attention to them. Only when they have lost their assets do they realize it. For what else.