The hack I referred to above took place on May 7th last year for slightly more than 7,000 BTC. You can read more about it here: https://binance.zendesk.com/hc/en-us/articles/360028031711-Binance-Security-Breach-Update
They were also hacked on August 7th last year, this time not for coins, but for a bunch of their customers' KYC data and documents: https://www.binance.com/en/blog/371631019142385664/Update--Action-Response-ThirdParty-Vendor-KYC-Matter

There is no such thing as "completely safe" from hackers. Every exchange and every wallet has the potential to be hacked, but storing bitcoin on an exhange (regardless of how reputable you think it is) carries a significantly higher risk of losing your coins than storing them securely on your own wallet.