.....
all options is possible for all cryptocurrency including ethereum
i think $4000 is to high for eth before 2021, but $40 is too low for eth before 2021 mate
and maybe the most reasonable price for eth is about $2000 before 2021

Yes, it seems that the real price of
ETH for a couple of years can be between 100 and 1000 (hardly 2000). But at the same time, I remember the fall of 2017-January 2018. This was a non-stop surprise.
Thus, neither news nor promising roadmaps can be a reliable argument for the forecast. This is some kind of contradiction: the impossibility to predict within reasonable limits, but perhaps something that we do not even expect.