It is still a question unanswered as to what could have caused the skyrocketing within that short period, but one way or the other, it is a volatile market and we just have to live with some of these quick fluctuations. Nevertheless, we still have a long time to confirm before we know if we are in a bull market or not.
I'm not sure what you mean by "it is still a question unanswered". The price went up because someone had been buying appreciable amounts of BTC across the market in a short while. I think it is possible to track down at which exchange the surge started off. I expect it to be one of the largest Bitcoin exchanges - like Bitfinex, for example. It is impossible to know who exactly was buying up - unless you are that dude. But do you really want to know that apart from sheer curiosity and what are you going to do with that knowledge anyway?