Personally, I feel bitcoin only has attained such price movements over the years because it was the first crypto currency but I don't really see any use of bitcoin, unlike so many other alts that actually do solve real world problems like Ethereum and the likes of it.
However, I feel bitcoin, even with how shitty it is as regards it's uses, will still be king in price movements.... well, at least for now.
it woll not be the king forever, in IT sector things change quickly, netscape was first browserm today nothing,
bitcoin will becoem a huge embarassement, only good thing is that it helped develop cryptoeconomics which is important and usefull, the banksters unpopularity helped bitcoin having its surge.