We all should be careful on how we use our accounts, not only that it is for security purposes but also for the identity that the hacker will be using once its been hacked. Now that we have this kind of technology those who wants to take advantage of it, will do everything to make it happen. So I do suggest that to prevent the hacking of account, we all should be careful and be observant on the things not only online but also in public places.
Yes that would be the right thing to do and keeping confidentiality of your bittrex account will be a most secured ways to do. Don't ever turn on your location by the time you're having transactions with bittrex, because those attackers will find you and could monitor what activity you've been doing; as been said they all wanted to take advantage of this kind of technology which authority will not easily can trace them. So always keep safe, never transact anybody who is stranger to you and don't ever share personal emails contact online if you're in doubt.