According to TechFlow, on December 18, Farside Investors data showed that Grayscale GBTC had a net outflow of US$84.7 million and a net inflow of US$3.8 million in BTC.
Grayscale ETHE has no inflow/outflow of funds, and ETH has a net inflow of US$4.5 million.
Bitwise BITB had a net outflow of US$24.4 million, and ETHW had no inflow/outflow.