ChainCatcher news, according to Bloomberg, the "Buy Bitcoin" sign behind U.S. Treasury Secretary Yellen during the House Financial Services Committee meeting in 2017 was recently sold at auction for $1.027 million. The sign was sold by Christian Langalis, who plans to use the proceeds to fund a Bitcoin software project. Christian Langalis is an intern at the libertarian think tank Cato Institute.Previously, in July 2017, when Yellen attended the House Financial Services Committee meeting, he managed to grab a seat behind Yellen and quickly wrote this message. After the slogan was captured by television stations, Christian Langalis was expelled from the venue.