Ken Griffin, the legendary hedge fund billionaire and founder of market-maker Citadel Securities, has changed his tune on Bitcoin and cryptocurrencies, revealing that "over the months to come" Citadel will likely "engage in making markets in cryptocurrencies."

“I still have my skepticism, but there are hundreds and millions of people in this world today who disagree with that. To the extent that we’re trying to help institutions and investors solve their portfolio allocation problems, we have to give serious consideration to being a market maker in crypto.”

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