You will never find 100% safe on third parties, they can be a scam anytime, trust no one is a good thing to anticipate any form of hacking so you can be more careful. Exchange sites are prone to hacking and scams. so you have to be smart in securing your account and you have to be smart in dividing your money into each exchange
It's no need to repeat same things with different words, it's pointless. Your reply is something I already understood, then whaaaattt?