The notion that quantum computers could crack Bitcoin's cryptography and overwhelm the network has been a topic of concern, but recent studies indicate that the energy needed to launch such an attack is equivalent to that of a small star. This raises significant doubts about the feasibility of quantum attacks on Bitcoin. Two recent papers highlight the limitations of quantum computing in this context, with one demonstrating that running a quantum algorithm against Bitcoin's mining process would be physically impossible due to the enormous energy requirements and the other showing that many 'breakthroughs' in quantum factoring are the result of rigged experiments. While the threat of quantum attacks on Bitcoin wallets is still a concern, the idea that quantum computers could break the network's encryption and mining process is not supported by current research.
Developers are working on potential fixes, including reducing key exposure and creating new types of signatures that can withstand quantum attacks.