The hard work would be maintaining a database of ideas which were similarly hyped over the past (say) couple centuries - including details on if/when each idea worked out, or fell out of hype-space, or was proven useless.

From that, you might be able to draw useful conclusions. Well...you'd also need correction factors for how profitable the hype itself was, over time, in the various scientific & technical fields.

The business model would be selling db access to VC's, R&D managers, and other folks making decisions about real money.