It has been explained to me, albeit, in layman's terms, that one of the reasons our modern cryptography works so well on classical computers is that they rely on prime factorization which classical computers don't do so well. This has been key to maintaining our computers and networks secured. One of the things Quantum computers do better than classical computers is prime factorization. How will the advent of Quantum computing impact cryptography? Will technologies like blockchains and bitcoin be affected?
Quantum computers have complex capabilities, and my guess is that their emergence could be dangerous for Bitcoin. One of these risks is their strong computing power. When we talk about the computing power of today's computers, we need to know that their power over computers Quantum cells are much, much smaller than we think.
And this computing power is one of the advantages that can hit the blockchain network and private keys.