About the amount of energy wasted, it is true, the energy used for securing the network is a waste, yet this waste is competing(or at least wants to be competin

About the amount of energy wasted, it is true, the energy used for securing the network is a waste, yet this waste is competing(or at least wants to be competing) with the alternative of physical security, of surveillance cameras, vaults and secure transport vans - or, alternatively, with banking electronic security systems. Compared to those, is the waste bigger or smaller for what it can offer? If you look it like that, at least for me, it makes sense and it seems quite efficient. As to this point, what do you feel for example, abotu hight frequency trading? Is that not a waste also? I think it's an even greater waste, but it seems, as long as something is making money, nobody bats an eye.