The notion that quantum computers could compromise bitcoin's security has been a topic of discussion, with some claiming that these machines could break the cryptocurrency's cryptography in a matter of minutes. However, academics argue that the actual threat is more nuanced. Two recent papers highlight the limitations of using quantum computers to attack the bitcoin blockchain, citing the enormous energy requirements and the lack of real-world applications for quantum factoring breakthroughs. The first paper examines the possibility of using Grover's algorithm to out-mine BTC, concluding that it would be physically impossible due to the vast energy requirements, which would be equivalent to the output of a star.
The second paper replicates major quantum factoring breakthroughs using a 1981 home computer and a dog, demonstrating that many of these achievements are exaggerated or based on simplified problems. While the threat of quantum computers to bitcoin wallets is real, it is not as imminent as some headlines suggest, and developers are already working on potential solutions to mitigate this risk.