[a16z Crypto: The security focus of public blockchains like BTC and ETH should be on protocol and governance, without blindly switching to quantum-resistant solutions] Odaily Planet Daily News: a16z Crypto published a detailed article on the X platform stating that the timeline for the emergence of quantum computers capable of breaking cryptocurrencies (CRQC) is often exaggerated, with the likelihood of their appearance before 2030 being extremely low. The risk profiles of different cryptographic primitives vary. Quantum-resistant encryption, due to the threat of 'Harvest Now, Decrypt Later' (HNDL) attacks, requires immediate deployment. However, quantum-resistant signatures and zkSNARKs are less affected by HNDL attacks, and premature migration could lead to performance overhead, immature implementation, and code vulnerabilities. Therefore, a cautious rather than hasty migration strategy should be adopted. For blockchains, most non-privacy public chains like Bitcoin and Ethereum primarily use digital signatures for transaction authorization, thus not facing HNDL risks. Their migration pressure mainly stems from non-technical challenges such as slow governance, social coordination, and technical logistics. Bitcoin faces unique issues, including its slow governance process and the existence of millions of quantum-vulnerable tokens worth hundreds of billions of dollars that may be abandoned. In contrast, privacy chains, which encrypt or hide transaction details, do face confidentiality risks from HNDL attacks and should transition sooner. a16z Crypto emphasized that in the coming years, implementation security issues such as code vulnerabilities, side-channel attacks, and fault injection attacks are more urgent and significant security risks compared to the distant threat of quantum computers. Developers should prioritize investments in code audits, fuzz testing, and formal verification.