The chief of hedge-fund giant Citadel has cautioned against what he saw as the speculative bubble in bitcoin over the years. Like many critics, the billionaire has compared it with the tulip-bulb ...

Its Bitcoin spot exchange-traded fund (ETF) has been its most profitable investment product ever. Meanwhile, Citadel’s Ken Griffin once ridiculed Bitcoin as the financial equivalent of tulip mania.

Citadel has invited its clients to cash out profits after gains at its flagship hedge rose about 15% last year, but most have chosen to hold their positions, Bloomberg reported Thursday, according ...

(Bloomberg) -- Citadel invited clients to cash out profits after a roughly 15% gain in its flagship strategy last year, but the vast majority opted to keep their money in the multistrategy hedge fund.

Those holding bitcoin are up 130% since the beginning ... at 100 times the price it traded at a few years ago, right?” Citadel CEO Ken Griffin said at the NYT DealBook Summit earlier this ...