Currently, quantum technology cannot crack Bitcoin.

Bitcoin's security relies on SHA-256 hash algorithm and elliptic curve digital signature (ECDSA). Theoretically, quantum computers could use Grover's algorithm to accelerate cracking SHA-256, and Shor's algorithm to break ECDSA. However, according to research from the University of Sussex, cracking SHA-256 within practical timeframes may require the computational power of 13 million to 317 million qubits, while Google's latest Willow chip has only 105 qubits, and IBM's highest quantum processor has just over 1,000 physical qubits, which is far from the necessary scale.

Additionally, quantum computing faces technical and economic challenges such as quantum error correction, algorithm optimization, extremely low-temperature environments, and high energy consumption. Moreover, the Bitcoin community has already been researching countermeasures, such as adopting lattice-based cryptography and hash-based signatures, which are quantum-resistant encryption algorithms. Protocol upgrades via soft forks can enhance Bitcoin's resistance to quantum attacks.