In my opinion the ethereum price decline is due to the price of bitcoin falling to $ 5,000. If the price of Bitcoin rises again above $ 10k, I think the ethereum price will go up because the ethereum price againts Bitcoin still stable
Obviously, in this case, all other coins will grow. Local rise and fall of coins is possible only with stabilization of the movement of bitcoin, which we have not seen for a very long time.
All that happens is the movement of bitcoin up and down, the rest of the market follows it like a messenger.
That speculation must applied for last weeks but not for this time as the price of bitcoin is still getting jumped back again. I think that we will not see another huge dump like that again. People have already thrown a lot of their bitcoin. The volatility is also getting stuck at 6k - 7k range and it's difficult to pass this level consider the resistance is really strong. Ethereum is also following it too.