a16z Crypto: The threat of quantum attacks is exaggerated; the security focus of public blockchains such as BTC and ETH remains on protocol and governance

Jinse Finance reported that a16z Crypto's official Twitter account published a long article titled "Quantum computing and blockchains: Matching urgency to actual threats." The article points out that the timeline for the emergence of quantum computers capable of breaking cryptocurrencies (CRQC) is often exaggerated, and the likelihood of their appearance before 2030 is extremely low. For example, digital signatures and zkSNARKs are not easily affected by "Harvest Now, Decrypt Later" (HNDL) attacks. Hastily implementing blockchain migration could instead introduce a series of risks such as performance costs, immature implementation, and code vulnerabilities. For most public blockchains (such as Bitcoin and Ethereum), the more urgent challenges are not quantum computing, but rather protocol upgrade coordination, governance complexity, and security vulnerabilities at the implementation level. The article suggests that, based on a rational assessment of the time window, it is better to plan ahead rather than rush to switch to quantum-resistant solutions. a16z Crypto emphasizes that in the coming years, security issues such as code vulnerabilities, side-channel attacks, and fault injection attacks are more pressing than quantum risks. Developers should prioritize investing in code audits, fuzz testing, and formal verification.