As I can see on the marketplace, it isn't just Bitcoin who is struggling with the price fall, almost every popular coin is hitting an average 10% -15% price fall. What is actually happening? There is something more to this, it can't be that every coin has problems right now. Something bigger is happening..
I agree but the bitcoin fall was quite huge and sharp around 40% as compared to the altcoins which approximately suffers around 15-20%. But most probably we are going to see a huge rise of altcoins in 2018 after the settlement of bitcoin price at certain level because alts are still below average.
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.