All is hackable, above all if it is a online system.
But i think that is not easy to hack the bitcoin system, and the team is constantly work to make secure their systems
But i think that is not easy to hack the bitcoin system, and the team is constantly work to make secure their systems
Everything can be hacked. In crptoworld, nothing is totally secure 
Both of you are wrong no one can hack the btc system it is completely impossible the only way to lose your bitcoins is by the user error like deleting the private or sending to a wrong address.Yes Bitcoin is hackable buts their is a way on how to secure your Bitcoin you need to install this apps in your devises Google authenticator this apps could secure all your sites and profit, you only have to do is scan the code and then enable the 2FA and that's it your account now is secured, Everytime you log in to your account just put the six digit code so you can log in successfully.
This is a way that no one hacks your account , there are still plenty ways to bypass this security but what if the sites database is itself compromised your 2FA won't help you in any way.The only solution to not lose any of your bitcoins is storing it on a offline pc or using a hardware wallet.