Bitcoin as "shalecoin"

[qubitasic]

"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/

[HeRetiK]

I think it's fair to say that Bitcoin as it exists today is not quantum secure, period.
Pieter Wuille https://twitter.com/jb55/status/1133533068197675010


1. The first owners of possible computers with the ability to 'frack' the privatekey will use these computers only for shalecoins. (Coins with no holder)

[...]

No such thing as "fracking" private keys of old unused coins in the foreseeable future, even accounting for quantum computing.

Note that Pieter Wuille's quote above refers to the public key of an address being exposed while sending a transaction from it. Old addresses that have never seen any outgoing transactions have never exposed their public key and can thus not be "fracked" by quantum computers. Neither Bitcoin nor quantum computers work that way.