Actually bitcoin is still the dominant crypto of the world so the variation of bitcoin price affects the whole market. Due to high price and high demand of bitcoin, it's volatility has also been increased and we have an upcoming fork (i.e Dec 2017), so there is high uncertainty in market due to all this.
For me bitcoin was just a minor case of price drops but I am looking for is that the other crypto currencies will also rise higher. That's how I view it with other crypto's to potentially higher in the future, specially when there's buy and sell that may happen instantly. Unpredictable price might surprice us when there's a demand that also eventually increase in population, so it's good to hold your bitcoins for a long term goals.