Earlier, as far as I remember, there was information that on some platforms they tried to launch their own cryptocurrency without an Internet connection. Even if it is possible, such projects will not succeed for the simple reason that the development of any cryptocurrency requires a mass audience. It is provided by the current global information network Internet. Even if the most perfect cryptocurrency is owned by a small number of holders in its own network, this cryptocurrency will have no value. Any such system needs the maximum number of users, and it is the Internet that provides this well.