OpenAI CEO Sam Altman thinks that the billions of dollars invested in AI now could create a bubble similar to the dot-com crash of the early 2000s.

"Are we in a phase where investors as a whole are overexcited about AI? My opinion is yes," Altman said at a recent dinner, per The Verge. "Smart people get overexcited about a kernel of truth."

The data shows that AI startups are the focus of more funding now than ever. According to PitchBook, AI startups raised $104.3 billion in the U.S. in the first half of 2025, which was almost as much as the total amount raised by all startups in 2024. PitchBook found that almost two in three U.S. venture funding dollars went to AI startups this year, higher than 49% of funds last year.

Related: OpenAI CEO Sam Altman Says Older Workers Need to Embrace AI — or Face Losing Their Jobs

Altman noted that AI startup valuations have now reached "insane" heights, as startups raise hundreds of........

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