CNBC's well-known host Jim Cramer: Due to concerns about the threat quantum computing poses to cryptography, he's preparing to sell off all his Bitcoin holdings. As soon as the news broke, the crypto community went wild, declaring that the bull market is officially back Jim Cramer is practically one of the most accurate contrarian indicators in history. Looking at historical patterns, every time he goes on TV to shout about selling, being bearish, or claiming he's liquidating, it often signals a market bottom or a massive rebound. While the idea of quantum computing breaking current cryptographic algorithms has been a long-standing topic in tech circles, the Bitcoin developer community already has a roadmap for quantum-resistant cryptography upgrades.