“2.1.2 An attacker could use a quantum computer to guess everyone's private keys.”
“It is very unlikely that quantum computing or any other field of scientific research will result in such a drastic rewriting of our understanding of the basic laws of physics.”
This is probably one of the easiest threats where he could have provided statistical analysis data, as private key collision is a very popular concern and there are numerous technical forums which have addressed it over the years.
He incorrectly states that “the private key is so large that it would take more energy than is produced by the sun in its entire lifetime to power a computer capable of guessing it.” This demonstrates a very poor understanding of not only Bitcoin, but cryptography and [quantum computing](https://www.ibm.com/communities/analytics/riskmanagement-blog/quantum-risk-management-schrodingers-dead