CNBC's Jim Cramer on Monday pushed back against the narrative that Wall Street's fervor for artificial intelligence is the same as the dotcom bubble of 2000, saying there are major differences in terms of the quality and funding of the current Big Tech stocks that are leading the market to new heights.

"Speaking as an internet pioneer, what I see now is the polar opposite of what we were seeing 25 years ago. When the dotcoms made bad investments, nearly all of them went under," he said. "But, worst case scenario, if Google and Amazon and Meta make bad investments and take big losses, that's just another day at the office."

Cramer explained that some on Wall Street doubt the validity of hyperscalers' huge investments in AI and data centers, and they fear the AI boom will bust and send t

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