Recent advancements in quantum computing have sparked concerns over Bitcoin's encryption security, with experts predicting potential vulnerabilities by 2030. IBM's plan to launch a fault-tolerant quantum computer by 2029 could challenge Bitcoin's elliptic curve cryptography and SHA-256 hashing. Google researcher Craig Gidney estimates a threat window between 2030 and 2035, while Blockstream CEO Adam Back suggests the risk is at least two decades away. However, David Carvalho of Naoris Protocol and Chamath Palihapitiya warn of possible breaches within five years if cryptographic upgrades are not implemented. The threat hinges on achieving fault-tolerant quantum computers with millions of qubits, a milestone yet to be reached.