Quantum computing and blockchains: Let's match the urgency with the actual threats. But first, where are we on timelines to an cryptographically relevant quantum computer? Lately, the timelines are being overstated — leading to calls for urgent, wholesale transitions to post-quantum crypto. This is a problem because it overlooks the costs and risks of premature migration, and ignores more salient security risks. More from @SuccinctJT below. ⤵️(a16z crypto)