chances of you getting hacked are too less unless someone targets you, unless you install a shady app outside from playstore. unless you visit shady sites. theres no need for anti virus tbh. and do you understand what is hacking?
twitter getting hacked has nothing to do with phones anti virus. they do with brute force. and samsung knox is not an anti virus, who told you that its anti virus? its a hardware level security chip, pixel comes with that too.
