I think today was bull for bitcoin. With close to $500 gain or more, it looks like a bull run is building up. We might see the hammer candles appearing often either reflecting panic in the market or indecision going on with traders.
An increase of almost $500 in a 24hr time frame doesn't automatically signifies a bull run. There should be a continuous upward movements everyday. Regardless of how small the rising percentage could be as long as there's a daily progress, it can turn into a bullrun.
Remember, we once have experienced a $900 increase in one day this month, but didn't hold or even broke the $10,000 barrier.
Imo, I don't call it a "bull of the day" when Bitcoin pumps above 5% for a day or two. More likely It's just a dead cat bounce when it starts going down again.