[Castle2.0]

Tell me more about this "quantum resistant algorithm",,,

I am glad you asked. You asked twice, so you must be serious. I deal with the serious, not the curious.

"Quantum Computing Will Ruin Cryptography and Privacy"

Is a click-bait, made for general population plebs, news article title. That caught your eye on CNN or Fox. It's okay. Now, your lesson.

What you might not know is there is an ENTIRE discipline of "post-quantum" and "quantum resistant" cryptographic research.

Let me google it for you.

https://en.wikipedia.org/wiki/Post-quantum_cryptography

In contrast to the threat quantum computing poses to current public-key algorithms, most current symmetric cryptographic algorithms and hash functions are considered to be relatively secure against attacks by quantum computers.

Sources:

• Daniel J. Bernstein (2009). "Introduction to post-quantum cryptography" (PDF). Post-Quantum Cryptography. (link: http://www.pqcrypto.org/www.springer...0887010-c1.pdf)
• Daniel J. Bernstein (2009-05-17). "Cost analysis of hash collisions: Will quantum computers make SHARCS obsolete?" (link: http://cr.yp.to/hash/collisioncost-20090823.pdf)

If you won't read Bernstein's Paper he summarizes it quite nicely in his slides when he talks on it:

Originally Posted by Daniel Bernstein

All known quantum algorithms are fundamentally slower than traditional collision circuits, despite optimistic assumptions re quantum-computer speed.

By the time quantum computing seriously being a threat is within even 10 years of possibility, you'll see bitcoin go to a "post-quantum" algo.

But let's mark this November 2021, so I can come back in 2024 to say I told you so. Quantum still decades away. Bitcoin is $500k+