Quantum computing threatens today's FX prediction ecosystem. Shor’s algorithm could crack RSA-encrypted trade data in minutes, exposing bank strategies. Grover’s algorithm accelerates brute-force attacks on limit order books. AI labs now simulate quantum adversarial attacks – e.g., spoofing EUR/USD liquidity signals via manipulated news feeds. Post-quantum cryptography trials using lattice-based algorithms are underway at CME. Meanwhile, quantum machine learning experiments model 15-dimensional currency regimes (rates, inflation, geopolitics) simultaneously. A 53-qubit system recently optimized carry trade paths across 32 currency pairs in 0.8 seconds. Banks now audit AI prediction models for quantum vulnerability scores.