this is a warning !!!
Top 10 big exchanges is the next target hackers !!!
good luck, and be careful 
Just apply your mind and do not unnecessarily react on such fud. Although it is preferred to keep your valuable coins in some secure wallet instead on keeping the same in an exchange wallet but such one statement from a new person on this forum is not enough to react immediately. Good exchanges wallets are secured enough provided you chose 2FA authentication. Try not to share sensitive information of your account to any unknown person.
Usually hackers nowaday target the hot wallet directly by exploiting the hole within the exchange security however they also phished people into giving away their data so I think 2FA could prevent from hacking aswell
I do agree that OP is just being too paranoid, the exchange will always invest into the security of their exchange because once hackers could get through it is the same as being doomed by that fact investing to security is the first thing to come in the mind of an exchange developers
If someone is too afraid of losing their cryptos the answer is as simple as using hardware wallet.
Withdrawing your funds would mean you will forget trading and just hold your coins. There is a good side for that but you will also be missing the party by doing that. Though it safe to have your coins in the hardware wallet, you are trying to stop earning. Everyone is trying to accumulate BTC from the market, its your chance while we are in the accumulating phase. Let the hackers hack their way because when that happens the price will also dip which is another opportunity.