Just before 2023 ended, ARK Invest CEO Cathie Wood sold all of the company's remaining Grayscale Bitcoin Trust (GBTC) holdings. The firm's Next Generation Internet Fund (ARKW) sold 2.25 million shares of GBTC and used some of those holdings to purchase 4.32 million shares of the ProShares Bitcoin Strategy ETF (BITO). While both GBTC and BITO track the price of Bitcoin with futures, GBTC is slightly different from BITO in terms of its relationship with spot Bitcoin exchange-traded funds (ETFs). I