The notion that quantum computers pose an imminent threat to bitcoin's security has been a topic of intense debate. However, recent academic research indicates that the energy requirements for such an attack would be astronomical, equivalent to the energy output of a star.
This is due to the immense computational power needed to break bitcoin's cryptographic algorithms. Meanwhile, another study has replicated major quantum factoring breakthroughs using outdated computer hardware and a novel approach, highlighting the exaggeration of quantum computing capabilities in breaking encryption.
The actual threat to bitcoin lies in the vulnerability of wallets to quantum attacks, with millions of bitcoins stored in addresses with exposed key information. While the threat is real, estimates suggest that building a machine capable of such an attack is currently physically impossible, and developers are working on implementing fixes to mitigate this risk.