One of the most articulate advocates of the good bubble theory is Google’s former boss Eric Schmidt. “Bubbles are great. May the bubbles continue,” he told me at the Sifted summit last week. Their historical function has been to redirect masses of capital into frontier technology and infrastructure, which is good for the world. But the latest technological transformation comes with a novel twist: AI will one day far exceed the cognitive capabilities of humans. “I think it’s underhyped, not overhyped. And I look forward to being proven correct in five or ten years.”