Quantum computing, once a subject of jest within the tech community—always touted as being "10 years away" from commercialization—may now be taking center stage. As soon as next year, quantum computing is anticipated to surpass the practical threshold of 100 logical error-corrected qubits, with commercial-grade quantum computers already being integrated into cloud computing data centers. Several companies, notably IBM and Quantinuum, have made significant strides in related technologies, and the United States has invested substantially in funding multiple technological pathways. The commercialization of quantum computing will catalyze qualitative transformations in fields such as drug development, materials science, and financial modeling. However, it will also deliver a catastrophic blow to cryptocurrencies. Quantum computing has the potential to swiftly crack the elliptic curve encryption that safeguards the private keys of Bitcoin and Ethereum. Some malicious actors have already adopted a strategy of data collection now, with the intention of decrypting it once quantum computers reach maturity. There may also be instances of transaction front-running, where attackers exploit advanced knowledge of transactions to gain an unfair advantage. Once a market consensus is established, cryptocurrency prices could plummet precipitously. Moreover, quantum computers pose a threat to the existing cybersecurity infrastructure. The United States and other nations have already initiated the transition to post-quantum encryption. However, the migration process on the defensive side is expected to take 5 to 10 years, significantly lagging behind the potential 1 to 2-year breakthrough on the attacking side. This migration entails the replacement of the entire encryption system, a task of immense complexity. Nevertheless, it also presents business opportunities for post-quantum migration services.