Quantum computing may have just entered a new era. China claims to have developed a machine capable of performing in 25 microseconds operations that no classical supercomputer could replicate before a time beyond comprehension. Behind Jiuzhang 4.0, presented by the University of Science and Technology of China (USTC), an explosive issue is already emerging for the crypto industry: the future security of bitcoin in the face of accelerating quantum technologies. This breakthrough also reignites the strategic battle between Beijing and Washington in the global race for computing power.