>>74252
BitChat? I have it. Its no replacement for LoRA (short radio wave + crypto), but its just a free app. I don't think bluetooth is that secure tho.
The use-case here is more so for organizing with other people, important for people in Europe mainly who are utterly fucked.
I'm not sure how it would ultimately reach the BTC (or other currency) blockchain without bridging to the internet.
If you had a meshnet of bluetooth it would be able to have its own blockchain, but not really keep up with the old one.