Quantum computing firm Project Eleven has announced the “Q-Day Prize”, offering 1 BTC to the first team that can successfully break Bitcoin's ECDSA signature algorithm using a quantum computer with Shor's algorithm within one year. The goal is to highlight the potential threat quantum technology poses to Bitcoin's cryptographic foundations. The company estimates that around 6.2 million BTC (worth nearly $500 billion) could be vulnerable if such a breakthrough occurs.