Google has published a paper describing how a quantum computer could theoretically derive a bitcoin private key in 9 minutes, potentially impacting the future of bitcoin, other tokens, private banking, and potentially the world. Quantum computing is a fundamentally different kind of machine, starting with a very cold, very small loop of metal where particles begin to behave differently than normal physics. The most common type of machine is a loop of superconducting metal cooled to about 0.015 degrees above absolute zero, colder than outer space but here on Earth, where electricity flows through the loop without resistance without resistance. However, at quantum scales, current flows in both directions simultaneously, breaking the rules of physics. Quantum computers use qubits instead of bits, which can be 0, 1, or both at the same time. The physics behind how quantum computing works is not intuitive, but it is not yet intuitive. The process of building quantum computers is challenging due to the laws of physics that prevent it from being able to perform calculations at extremely small scales.