Your post title should be change because the chain was not hacked rather it was the bridge. lets get out headline straight in other not to mislead the reader.
One thing I know for sure is that, the Security architecture of BNB Blockchain has improved following it's hack.
Indeed their security has been upgraded and everything was done as fast as they can. but the security increase does not mean its beyond hacking again. no one have ever imagined that the bnb bridge can be penetrated one day.
the higher the security the more the hackers and others will still continue giving it another try until they fine the vulnerability.
We should all just be security conscious and not feel reluctant.