Bitcoin ETFs recorded over $1 billion in outflows ahead of Christmas, while Ethereum ETFs saw an inflow surge.Bitcoin ETFs experienced net outflows of $226.5 million, with Fidelity's FBTC leading the declines.BlackRock's IBIT ETF attracted $31.6 million in inflows, bucking the downward trend of Bitcoin ETFs.On the other hand, Ethereum ETFs received $130.8 million in inflows, with BlackRock's ETHA leading the way.