And also avoiding your personal data and government documents falling into the wrong hands. Any centralized exchange can be hacked, just like Poloniex demonstrated. And so can a DEX. But with a CEX, the problem is that they have files which could be used against you, for example identity theft, and after that comes much worse. I would not recommend it. Imagine waking up one day to discover you are a wanted felon in some foreign country and you owe people money because someone borrowed money with your ID. Really bad situation.

If you absolutely need to trade, use a good DEX.