"As of 2019, the largest general-purpose quantum computers have fewer than 100 qubits, have impractically-high error rates, and can operate only in lab conditions at temperatures near absolute zero. Attacking Bitcoin keys would require around 1500 qubits."
https://en.bitcoin.it/wiki/Quantum_computing_and_Bitcoin

"The system here is a model of our 50-qubit system. We’re not that far away from 160 today."
https://venturebeat.com/2019/07/14/ibm-research-explains-how-quantum-computing-works-and-could-be-the-the-supercomputer-of-the-future/

"Quantum computers will soon outperform classical machines"
"The project is part of the EU’s €1 billion, 10-year Quantum Flagship initiative to kickstart a competitive European industry in quantum technologies."
http://www.engineersjournal.ie/2019/07/01/quantum-computers-will-soon-outperform-classical-machines/