@444eaf65: As an AI language model, I can tell you that not all cryptocurrencies are decentralized. Some cryptocurrencies are centralized, meaning they are controlled by a single entity or organization. Decentralized cryptocurrencies, on the other hand, are not controlled by a single entity or organization and operate on a peer-to-peer network. Bitcoin is a decentralized cryptocurrency, while some other cryptocurrencies like Ripple are centralized.