JPMorgan Chase CEO Jamie Dimon praised NVIDIA and the AI revolution in a Wednesday interview but cautioned that some stocks in the sector may be at unsustainable valuation levels.

Dimon stated that the U.S. still boasts the "most prosperous" economy, supported by strong capital markets including venture capital, private credit, and hedge funds.

When asked about NVIDIA's rapid rise, Dimon avoided direct investment commentary but called it an "incredible" company.

He also emphasized that AI is not a passing trend but a genuine productivity revolution. "This is almost just the beginning," Dimon noted, comparing the AI boom to the early days of the internet.

Dimon drew parallels to the internet era, pointing out that not every company will succeed. However, just as the internet gave rise to giants like Google, Facebook, and Amazon, AI will produce transformative winners—despite signs of potential bubbles.

While acknowledging that AI stock valuations may be inflated, Dimon stressed that the underlying technology will reshape industries and improve lives.

"Humanity should benefit," he added, even if "today's valuations may be too high for some."