The article was back and forth and not much to really learn because for me, I don't depend on these histories to hold a coin. I decide base on what I'm viewing from my system immediately. I look at the future of the coin and uses.
At least he gave us a good price history of Ethereum, although we all know that most of the time, past performance or history doesn't mean future successful in this market because of so many factors like volatility and supply and demand.
For the analysis, I could say price was reacting according to the need for the coin and rejection too.
Definitely, every coins reacts as to how the investors perceived it. We have seen Ethereum up's and down's this year. Who would have thought that after hitting a all-time-high last January, it will suddenly go on a downward spiral worst than bitcoin?
As for the personal view of the OP, You should also consider that Ethereum bagholders are usually ICO project and as this bear market, they will easily dump it if necessary. They need funds to channel out in their operations so its really hard to grasp as to where the price could go.