Did Janet Yellen sell the 'buy bitcoin' sign?

As a seasoned observer of the cryptocurrency and financial markets, I must inquire with a keen eye of skepticism: Did Janet Yellen, a renowned figure in the realm of monetary policy and economics, sell the "buy bitcoin" sign? This query arises from the increasing prominence of Bitcoin and other cryptocurrencies in recent years, which has sparked widespread debate and speculation among investors, policymakers, and economists alike. Given Yellen's vast experience and influence in the financial world, her views and actions have the potential to significantly impact market sentiment and trends. Therefore, the question begs to be asked: has she indeed signaled a shift in her stance on cryptocurrencies, or is this merely a fleeting rumor amidst the volatile nature of the digital currency landscape?