Lets explores the challenges and opportunities presented by quantum computing, particularly focusing on the urgent need for Post-Quantum Cryptography (PQC). We details how distributed quantum computing (DQC) is overcoming hardware limitations to create powerful quantum machines, which in turn pose an existential threat to current encryption methods. The report highlights the "Harvest Now, Decrypt Later" strategy, where adversaries collect encrypted data today for future decryption by quantum computers, emphasizing the immediate risk to long-term data confidentiality. It outlines the NIST standardization process for PQC algorithms and offers a strategic roadmap for organizations to migrate to these new, quantum-resistant standards. Ultimately, the dicussion frames PQC migration not merely as a technical upgrade but as a crucial geopolitical and national security imperative to maintain digital trust and economic competitiveness.