As per the latest, Google has reached Quantum Supremacy. Meaning it could potentially decode an entire blockchain and...
YOUR PRIVATE KEYS...
Blockchains are secured through elliptic curve cryptography (ECC), just like encrypted user data and website traffic. Now the issue is that ECC is NOT "quantum-safe" meaning that a quantum computer could theoretically decrypt a user's private keys and forge transaction signatures.
Is this the end of Crypto?
I don't think so, but I'd love to hear your opinions too! (Especially the opinion of a cryptographer)
source
https://www.coindesk.com/what-googles-quantum-supremacy-means-for-the-future-of-cryptocurrencyIt could. But that's it. It just could. Theoretically anyway. And even if that time could come, blockchain itself would have improved immensely and would have made precautions regarding quantum computers. Just like in the source you gave, Canada has already made baby steps towards the prevention of such thing from happening.
Also bro, this has made the forum quite a few times now, you should just probably look it up here and check some of the posts out. or i can just post it here, as such
https://bitcointalk.org/index.php?topic=5188910.0https://bitcointalk.org/index.php?topic=5186831.0