The guy who showed the sign “Buy Bitcoin” has already earned $15000. According to CoinDesk, on the 12th of July, during an appearance of Federal Reserve chair Janet Yellen before a Congressional committee, an attendee held aloft a "buy bitcoin" sign. The attendee and his friend were ultimately asked to leave, but the image of the sign quickly went viral. Soon after that the cryptocurrency trader CryptoEthan posted the picture with that guy – soon known as the "Bitcoin Sign Guy" – holding up the now-infamous sign with a bitcoin address as well. At a time of press, that address has gathered more than 6 BTC, which is almost $15,000 at current prices.