BTC is the OG, and unfortunately still has an enormous affect on all coins. It's influence will slowly fade, and has dropped down to around 40% of market value, but until it drops below 20% (which I can guarantee is not happening any time soon) it will continue to have an affect (either positively or negatively) on the markets in general. When I trade, I am always trying to increase value against ETH and/or BTC, very rarely even look at the dollar price as I don't intend to move back into fiat in the near future.