It's the reality that this computer technology we all have to face and live on....we can't really control them if they want to hack us or steal our bitcoin but atleast we can minimized the damaged they can do to us by protecting our computer or storing our BTC in an offline wallet.By having a good antivirus and opening site you don't trust we can somehow protect our pc and our self and then avoid holding large amount of coins in online wallet specially on trading platform will somehow minimized the risk of being hack.