Stop worrying about the Bitcoin quantum threat – Why Google can’t steal your BTC, and bad actors are decades behind

While quantum computing has made significant progress, particularly in moving towards logical qubits and error correction, a cryptographically relevant quantum computer capable of breaking Bitcoin's secp256k1 elliptic-curve cryptography is still decades away. Current quantum systems are far from the estimated 1,200-1,450 logical qubits and tens of millions of fault-tolerant gates required for such an attack. The path to building these machines involves overcoming immense engineering challenges, including scaling stable logical qubits, achieving sustained fault-tolerant operations, and integrating complex systems. Even if a top lab demonstrates this capability, the cost and infrastructure required for a facility-scale system will remain a significant barrier for malicious actors, pushing the timeline for their access to decades after initial proof-of-concept, similar to the historical progression of DES cracking.

(Source：CryptoSlate)