For me the sign of a bull run is when bitcoin can gained +2000$ in just a single day , from 8000$ to 10,000$ in jus 24 hours is sign that bullrun has just started.
A 25% growth in a single day is possible in this market but it is not a sign of a bull run, such movement is more likely to be the result of a huge positive news, besides while there are different definitions of what is a bull market I will define it as a long term positive trend, and while a 25% growth in a single day fulfills the positive side of the definition it is not long term, so the question is are we in a bull market? And the answer is yes, since the first days of February we had only two losing weeks while the rest were positive, just remember that trends can change at any moment and there is a possibility that we could be seeing once again the change of the trend.