From the bitchat GitHub repository:

A secure, decentralized, peer-to-peer messaging app that works over Bluetooth mesh networks. No internet required, no servers, no phone numbers - just pure encrypted communication.

How can you argue with him when the name is all lowercase, and the word decentralized is thrown in? Reading that immediately brought to mind a toy I used to chat with classmates when I was in elementary school called Friend Link.

This nostalgic Reddit user explains it as succinctly as Dorsey does with bitchat:

It was like a toy beeper. You could send text messages to friends who also had a Friend.link, so long as they were within 25 ft. of you lol

I found the commercial for it on YouTube

https://youtu.be/pykHPIwssfc

Playmates Toys is about to experience a wildly unforeseen resurgence. 🤭