When it comes to investments, hindsight can sometimes be 20/20—a lesson that Kraken co-CEO Arjun Sethi learned the hard way.

“One of my developers from my first company gave me a desktop with Bitcoin that he had mined. This was in 2009, and then I threw it away. I think it was worth maybe $300-$400 million today,” Sethi said in an interview with Crypto Editor Jeff John Roberts at Fortune‘s Brainstorm Tech conference.

Arjun Sethi is the co-CEO of Kraken and the chairman/co-founder of Tribe Capital, known for bridging operating leadership with venture investing across crypto and frontier technology. He became Kraken’s co-CEO in October 2024 after serving on the company’s board since 2021, stepping in to lead alongside David Ripley.

Bitcoin had a value close to $0 when it was first mined, back when Sethi says he was gifted some. Today, each Bitcoin is worth more than $115,000.

Sethi also told Fortune he believes crypto, a notoriously volatile sector, is in the midst of a bubble.