Ethereum has shown historically that it can go up really high in a short period of time, but then it drops back as well really fast.
It recently reached it's all time high and most likely will reach $5,000 - $8,000 in the next 3-6months, but the important thing to watch is not how high it will go but how far down will it drop between Nov 2021 - March 2022 in order to find the a new support for growth from March - Oct 2022.