Ethereum briefly dropped below $2,387 amid Tether investigation speculation.Whale activity surged to a six-week high, with 6,428 new wallets created by large holders.Analysts predict potential upside for Ethereum, with some suggesting it could rise to $4,000 or even $6,000.Ethereum currently trades at $2,470, reflecting a 2.84% decline in the last 24 hours and a 6.61% dip over the past week.