The security of your wallet depends on your actions. Hacking the wallet of one user is very difficult for hackers. I doubt they'll do it. But a lot of users by their negligence leave a lot of confidential information on the network that allows hackers to quickly access the victim's wallet.
Negligence and poor security that's how hackers can penetrate your device, the best thing to do is make sure that you have necessary extra security, sometimes even a small information that we exposed in the net can be used to target us by hackers who doesn't bothered to spent time to get what
they've want, better to be well prepared and learned to maximized security defense from your devices.