Using exchanges nowadays is becoming alarming because they are often targeted for data leaks, and scammers are increasingly focusing on them.
This thread also talks about Bithumb, which turns out to be a South Korean crypto exchange. Reports say they are investigating a data leak; the initial result of a hack is that they accessed their internal mobile system, which shows how weak and vulnerable the way they handle user information could be, as they have no control measures against anything related to that.
Although they are investigating it to determine the extent to which user information on their platform was vulnerable and to see whether any was attacked, all of these together constitute the increasing rate of cyberattacks on the internet these days and why we should be more conservative about the information we are releasing to centralized exchanges.
Source:
https://cointelegraph.com/news/bithumb-discloses-data-leak-after-internal-system-breach-report