On July 12, 2017, while Federal Reserve Chair Janet Yellen was testifying before Congress, a young man silently raised a hand-written sign behind her: “Buy Bitcoin.” The moment was captured live by CNN, Bloomberg, and BBC — instantly going viral and turning the anonymous protestor into a #Bitcoin folk hero, later known as Bitcoin Sign Guy. It was a peaceful act of defiance, echoing the protest culture of the 1960s. His handwritten sign was later auctioned for over $10,000, and the image has since inspired NFTs, posters, and T-shirts. One sign. One chance. One statement that echoes. If you could hold up one sign to the world, what would it say?