A general view of the GameStop logo on one of its stores in the city center of Cologne, Germany.Ying Tang | Nurphoto | Getty ImagesVideo game retailer GameStop announced Tuesday its board has unanimously approved a plan to buy bitcoin with its corporate cash, echoing a move made famous by MicroStrategy.The meme stock jumped more than 6% in extended trading Tuesday following the news. The announcement confirmed CNBC's reporting in February of GameStop's intention to add bitcoin and other cryptocu...