Ethereum price grew that much in the first place because this project was the first one to offer something else apart from the means of payments. It's the platforms for developing dapps and smart contracts.
But as far too many projects rushed to use it for their needs, the system proved to be not so stable.

Many issues have been uncovered, such as
- impossibility to scale
- high transaction fees when the network is overloaded
- the risk to lose you money due to the bugs in the code

New projects with better indices are already available and most likely they will replace Ethereum in time.
So I doubt if its price will rise that much again.