There was definitely a sharp jump in the price of bitcoin. There is no definitively one reason why this rise occurred. It's probable that this is just one of the short term pumps that will not convert into the actual recovery from the bear market.
while i'm hopeful this might develop into a legitimate mid term uptrend, we're a long ways away from establishing that, and people are a tad too bullish for my liking.
the low $7000s should be a major resistance level, given the previous action there. bears have been selling the bounce consistently, so we should definitely be prepared for a run back to the mid-$6000s.