There's a lot of intelligent individuals especially hackers now a days. For me, I think bitcoin assures the security of their users so they come up of having paper wallet etc. So in our part maybe we should think a strongest password and make sure to always logout and dont share personal info:) to prevent this kind of event.
yeah i think they can hack some of the site that hold bitcoin cause hacker really smart. if you dont want to get hacked save you password, private key or anything that link you to your bitcoin into some safe place in a flashdisk don't save them into cloud system like google drive