Exactly one year ago, Eth was only slightly more than $10 per coin. While it may seem that Eth is 'stuck' at ~$300, it fluctuates in price so much because it is attempting to stabilize before it makes more gains. In the past few months, Eth has become more stable and it just happens that its current point of stability is at ~$300. Once Eth switches to a POS system, it will become MUCH more stable (it may drop a bit before stabilizing- because miners are selling). At that point, we will see long-lasting and stable gains.
Good luck and remember to do your own research (do NOT blindly trust others).
I think, it being "stuck" is an effect of bitcoin's price surge this past few weeks, just like it affected many of the altcoins across the market. Bitcoin has really gone up the charts, unfortunately, at the expense of altcoins, and Eth, even despite it's proven stability, is no stranger to that negativity. But, from 10 to 300 is still successful if you would look at the percentage it has increased. It's just that bitcoin can't be compared because it is in a league of its own.
