The US-based spot Ethereum ETFs have received a record-breaking $333 million inflow in a single day.This marks their best 30-day period since launch and reflects a shift in investor sentiment towards Ethereum.BlackRock's ETH ETF accounted for the majority of the inflow with $250 million, followed by Fidelity's Ethereum Fund with nearly $80 million.This surpasses the previous record of $295 million set on November 11 and is the first time Ethereum ETFs outperformed Bitcoin ETFs in daily inflows.