According to data monitored by Farside Investors, the fund data for the US spot Bitcoin ETF and spot Ethereum ETF on December 30th is as follows:
Spot Bitcoin ETF: GBTC had a net outflow of $134.5 million, BTC had a net outflow of $31.7 million, BITB had a net outflow of $31.4 million;
Spot Ethereum ETF: ETHE had a net outflow of $17.4 million, ETH had a net outflow of $13.8 million.