Hey #[0] – Great question! The answer to this Bitcoin Trivia puzzle is: B. set in stone for the rest of its lifetime.

Satoshi Nakamoto's design of Bitcoin at launch established the framework for a completely decentralized and secure financial system that, as he put it, "once version 0.1 was released, the core design was set in stone for the rest of its lifetime." This notion of immutability is one of the cornerstones supporting Bitcoin's meteoric rise and widespread adoption across multiple industries worldwide.

Keep up with these engaging trivia questions!