Infinity / 21 Million Bitcoin T-Shirt

21 million. That’s it. The Infinity / 21 bitcoin t-shirt celebrates the fixed supply that makes Bitcoin the hardest money ever created.

Bitcoin's rules cap the total supply at just under 21 million coins, and new coins are released on a schedule that halves roughly every four years. That hard limit sits at the heart of the saying “everything divided by 21 million”: every good, service and currency on Earth measured against a fixed amount of bitcoin. Writing it as infinity over 21 million is the shorthand version, a single line that contrasts unlimited money with an asset nobody can print more of.

Made for the person who enjoys explaining things. Pixel type and a thin orange rule keep it understated, so it works under a jacket at the office or at a hackathon. Bitcoiners read it in a second, and everyone else gets a small math puzzle that starts a conversation.