Kimbal thought that it would be better for his brother to start his own social media platform based on the blockchain. Perhaps it could include a payment system using Dogecoin, Elon mused. After brunch, he sent Kimbal a few texts fleshing out the idea for “a blockchain social media system that does both payments and short text messages like Twitter.” Because there would be no central server, “there’d be no throat to choke, so free speech is guaranteed.”