If we talk about hackers, there are people who really good in hacking. So, its possible that they can hack our wallet if they want to. Thats why we really have to be careful. I hope and pray they will not do that to us. Thats scary because we work hard for what we earn in bitcoin. I used to watch a documentary of hackers who hacked some of a goverment agencies which had a very tight security but hackers still be able to penetrate. And thats very very scary. There are people who are very professional and genuis in hacking online.