Nouriel Roubini said that the decline of Ethereum was triggered by a few active decentralization applications (DApps)
and the result is 80% ETH drop and fall, DApps is crypto kitties, scammy, ponzi pyramid, and casino games. so the cryptocurrency has lost its value.
Can't say I'm surprised. Ethereum has had several issues over the years including scalability.
I remember when people used to think that ETH could seriously rival BTC but we're way beyond any flippening happening.