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Other users also recalled other popular buzzwords, such as "AI" and "cloud." At the peak of the cryptocurrency craze in 2017, blockchain became the shiny new thing.

Krugman is a long-time Bitcoin naysayer, who criticized the world's first cryptocurrency in his New York Times op-ed called "Golden Cyberfetters," which was published all the way back in 2011.

In a New York Times op-ed, which was published earlier this week, Krugman opined that the most recent cryptocurrency crash might be different, claiming that crypto is just a massive bubble inflated by fear of missing out.