Quantum computing poses a significant threat to encryption systems that secure crypto transactions and communications. As quantum computers advance, they could decrypt current systems used for securing crypto wallets, bank assets, and private communications much faster than traditional supercomputers. The idea of 'Q-Day' highlights the urgency of this issue, as malicious actors are already harvesting encrypted data, betting on future advancements in quantum technology to decrypt it. Recent warnings from experts and major financial institutions indicate that significant amounts of cryptocurrency, including Bitcoin and Ethereum, could be vulnerable to theft once quantum computers break existing encryption methods. The proposed countermeasures include transitioning to post-quantum cryptography to secure blockchain systems and communications. Urgent action is required to build quantum resistance into these systems before it is too late, as failure to do so could lead to a total collapse of digital trust in these technologies.

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