I think bitcoin price fluctuations have a deep relationship with other coin price fluctuations, what do you think about this?
The influence of bitcoin prices in other coins is obvious as all other coins are getting their value in terms of bitcoin and when bitcoin is rising then most coins will diminish and also when bitcoin is falling then most altcoins will fall but when bitcoin is trading in range bound then altcoins may rise. But, these are based on observations and there will be limitation for these to remain true all the times.
Except few altcoins, all others are lagging in decent volume which is the reason they do get manipulated easily.