most of these problems should be solved by the emergence of a new technological product for cryptocurrencies, which will be like anti-virus SOFTWARE to find and eliminate vulnerability problems and use standard solutions that have passed all kinds of security certification.
Crypto isn't an operating system that needs anti-virus to clean those problems.
It needs real solution and blockchain network itself can't be inserted by any virus that you are thinking. It can be delayed and slowed down and that's what it needs to be resolved.