I have never traded on CRYPTOPIA exchange, we should trade on reliable exchanges such as binance, OKEx ... it will be safer and the percentage of being attacked and losing money is very low
well it's not confirmed unless you see logs of the hack.
most of the KYC documents on the darknet is not from Binance, they are instead coming from Bittrex which sold them on the dark markets and then pretended their system had a weakness which led to the leakage of the personal data of their users.