Every period, crypto has a different level in developing the market value of its coins. Perhaps this year or the following year, a decrease in the current ethereum value can now provide a higher source of energy for ethereum than the previous value achieved. This event will be coming soon when crypto has found bitcoin to increase and be stable.
The forecast for ethereum largely depends on the events planned by the network developers for 2019 and announced by Vitalik Buterin in the spring of this year. After the planned hard forks, there will be a change of protocol: switching from PoW (proof of work) to the distribution of the share Proof-of-Stake (Casper), which will provide a threefold increase in throughput, increase the speed of payment transactions, reduce the cost of auxiliary domestic currency conducting transactions.