An upgrade in Ethereum might have a positive impact on the cryptocurrency, which in turn might bring about an increase in price. As to what ETH price would be at the end of 2020, cannot be said, but there would be hope for the altcoin to attain a 2k range, if only it can reach its previous peak it attained in 2017.
When the Istanbul was the new ETH update, the market seemed to revive a bit while engulfed in the bear market. Perhaps this is the coin I trust the most in the market, it has a huge impact. I am sure in the near future it will return to the market.
The current market situation is not enough strong to debate regarding the potential return of ETH investment. During the ICO hype, everything was different and the new economic model craziness dedicated the power of investing in technological development. Perhaps, the new market cycle will be the next step for high ETH price, the probability of reaching ATH will increase too.
And that is why the price of ethereum is having such problems to go up again, at that time most of the demand came from people that wanted to get ethereum because they were interested in investing in icos, in fact I remember that back in those days many of those icos did not even accepted any other cryptocurrency other than ethereum if you wanted to invest in them and this increased the demand for ethereum to unexpected levels, but since icos are in such a bad shape this also has an effect on ethereum and if it wants its price to recover then ethereum needs to find another way to generate demand.