because I'm deeply in QC topic (and: because what Andreas Antonopoulos talked about QC is naive AF)

"Karagiannis points out that a key warning sign will arrive when a quantum computer reaches about 4,000 error-corrected qubits. “RSA 2048 will [then] be vulnerable to attack, which means all secure transmissions using the cipher will be reversible to plaintext" https://www.informationweek.com/security-and-risk-strategy/is-it-time-to-start-worrying-about-quantum-computing-security-

versus

"the company says may help it produce quantum computers with more than 4,000 qubits by 2025." https://spectrum.ieee.org/ibm-condor

versus

some chinese scientist inside says again: "2 years" (in the full article, unfortunately behind paywall now...) https://cacm.acm.org/news/269628-underdog-technologies-gain-ground-in-quantum-computing-race/fulltext