In my opinion, everything online can be hacked but it would not be a piece of cake for the hackers, they would need extraordinary set of equipment, skills, method, time, etc. for the hack to commence. What we can do about this is to secure our keys and passwords, avoid clicking suspicious links, check your surroundings, have an offline wallet if you have massive amount of bitcoins, get a secure e-mail, etc. Hackers use different kinds of methods to hack, we must know how to protect ourselves from their methods.