CNBC's "Mad Money" host Jim Cramer has sold his Bitcoin holdings, expressing concerns that powerful quantum computers could soon compromise Bitcoin's cryptography, potentially leading to significant losses for crypto investors. However, the article's author suggests this "quantum threat" is overstated, noting that a consortium of firms, including Coinbase Global and MicroStrategy, announced efforts in July to enhance Bitcoin's cryptographic security against such risks, pledging over $15 million.