There are so many factors that determines for the market price of bitcoin at any point, this majorly have to do with the rate of its equilibrium shift from its demands and supply as the people are buying and selling, this makes it more volatile and in demand,, while the network keep increasing and more people interested are coming in, as you might have known before, the lesser the supply, the more the increase in demand and this is what cause the market to rise, while there are other minor occurrences that may also contributed to a short time market volatility in one directed, such could be breaking news or market season.