Security and protection is very important. Esspecialy when you have something they you can lose for example money.
I absolutly agree with you. Safety is very important ecpessialy in cryptocurrensy. A lot of cryptocurrency exchanges was hacked and people lost money. So protection is very important.
Most cases of hacking occur because of hasty actions on the network. In these cases, the antivirus does not help (for example, specify a key in some form).
Very often people buy themself give the private keys to hackers. For example not long ago it was popular hardforks and people to get free money of hardfork gave the private keys to account with money. Antivirus can not help in all the cases but it can help in many cases.