Body can’t function without a head - that is true but not for every organism :) bitcoin is not like a human body - it is more like an octopus’s body (maybe there is a better analogy but I don’t have one now). octopus has its neurons distributed across the whole body, and 2/3 of all neurons are in its limbs. Octopus has partially  decentralized nervous system 😊  so it’s not a perfect analogy but a decent analogy. Also imagine an organism which has fully decentralized nervous system. I can think of one , can you 😉?