Will quantum computing disrupt financial systems within the next decade?
Core argument: Quantum computing systems are forecast to grow 100x from dozens today to ~5,000 by 2030, driving commercial viability across cryptography.
Industry observers estimate there are scores of quantum computing systems in the world, a number forecast by McKinsey to rise to around 5,000 by 2030. Sceptics point to the significant technical hurdles that remain to making useful quantum computers. Existing machines are still far too error-prone. The “engineering challenges” that the devices’ developers insist can be solved in the next few years are formidable. But as the new machines begin to indicate they can outperform conventional computers in niche areas — what the industry dubs “quantum advantage” — the risk of dismissing the technology’s importance is growing. Organisations are readying themselves for the prospect of Q-Day — the predicted moment when quantum computers are capable of breaking the cryptographic methods on which modern societies rely.

