PANews reported on October 21st that, according to CoinDesk , Coin Metrics co-founder Nic Carter called quantum computing the greatest long-term risk to Bitcoin's core cryptography. He explained the one-way nature of deducing public keys from private keys via the secp256k1 elliptic curve, and pointed out that exposing public keys on-chain during spending transactions increases the potential attack surface. Carter recommends avoiding address reuse in the near term to reduce public key exposure, and promoting post-quantum signature schemes and feasible migration paths in the long term. A subsequent article in his series will discuss the " post-quantum break " scenario.