https://www.cnbc.com/2021/02/22/yellen-sounds-warning-about-extremely-inefficient-bitcoin.htmlWhy thank you Joe Biden for your nomination. Bitcoin is tumbling for multiple reasons today but I don't find her comments particularly true or useful. And besides, if we're talking about energy usage, does it not take a metric ton of energy to continually print USD? Pretty sure there was more printing within the last two years than ever before in US history. Those energy bills stack up, ya know.