MicroCloud Hologram, a Nasdaq-listed company, has announced a $400 million investment to upgrade the Bitcoin protocol to withstand quantum attacks. According to Odaily, the company plans to develop a quantum-resistant protocol based on a multi-layer hybrid encryption architecture, integrating a parallel verification mechanism for post-quantum signature algorithms alongside traditional signature algorithms. This framework allows users to opt for dual signatures using both ECDSA and quantum-resistant signature algorithms, ensuring security redundancy before quantum threats become prevalent. The hybrid signature strategy not only strengthens the system's defense capabilities but also provides ample transition time for network upgrades, mitigating systemic risks associated with a complete overhaul.