It caused by the trend. the market still pegged to the bitcoin price.
The price of bitcoin pair looks stable but the dollar value will be following bitcoin anytime.
I have other option in this answer/post.
Remember if bitcoin price was increase and the majority of altcoins will be following the bitcoin chart to get increase too.
- Walker
Sometime yes it depends all in bitcoin value when top 1 increase one coin and all well rise but there is still some chances that:
(for example)
1. If bitcoin decreases all of different altcoin will decreases.
other scenario
2. bitcoin increases ethereum can still stay the same or can be left behind.
Not just because bitcoin who increases and affect other coins it still base on other people/investors investments.
Like a scenario before ethereum value moves and bitcoin value remain or stay still that has no value increase.