There are a number of software wallets for Bitcoin, but I believe the best way to store your Bitcoin is through a hardware wallet. Most times why people's wallet get hacked is as a result of poor handling of their keys, so to make sure you stay safe, try as much as to keep your keys safe from they prying eyes of the internet by either using a cold storage.
even if you are using a hardware wallet there is still a chance that you can experience a problem. Like for example what of you did loose your hardware wallet ? Or what if it is get damage by water, fire , sand or you accidentally drop it and it got shocked resulting for you to loose all you data inside it .
you can also get hacked or phihsed whenever you insert your usb ( hardware wallet ) and paste your private keys to any exchange .
See? Almost every action do still have a risk . so whether you use hardware or online wallet , their security are both the same .