"And I’ll be clear, I’ve been in the naysayer camp over that period of time. But the crypto market today has a market capitalization of about $2 trillion in round numbers, which tells you that I haven’t been right on this call," he continued. Last fall, Griffin told the Economic Club of Chicago that regulatory uncertainty was keeping the market-making firm out of the crypto space.

https://www.theblockcrypto.com/linked/135864/griffin-says-fair-to-assume-that-citadel-will-be-market-making-in-crypto-in-months-to-come