Decentralization in itself do not have a cost. When this architecture is applied to some concrete case it may have cost it even be wrong. For example one can a

Decentralization in itself do not have a cost. When this architecture is applied to some concrete case it may have cost it even be wrong. For example one can argue that if Europe had been kept under a central authority since Charlemagne, Europeans would have suffered much less wars, and maybe would have had less need to bring war and colonization worldwide. But for a currency, distribution of goods, communication, etc decentralization is probably better, i.e. have more value than its implementation cost.