According to data monitored by Farside Investors, the fund data for the US spot Bitcoin ETF and spot Ethereum ETF on December 20th is as follows: Spot Bitcoin ETF: GBTC had a net outflow of $57.4 million, BTC had a net inflow of $6.4 million. Spot Ethereum ETF: ETHE had a net inflow of $7.5 million, ETH had a net inflow of $8.1 million.