Ethereum is testing strong resistance near $4,000 and may rise to $4,200 if broken.A whale investor sells 11,638.9 ETH for $46.4 million, securing a 96% return.Ethereum-based ETFs have attracted $1.3 billion in inflows over the past two weeks.Fidelity's Ethereum Fund (FETH) leads with $113.6 million in inflows on Dec. 6 alone.