Most people seem to be panicking, but in reality a good healthy pullback is just what BTC needed. Anything that goes straight up without any kind of retracement is not healthy and probably a mania. Bitcoin is on fire, for sure, but I'm afraid many of the investors are expecting 100% gains every day and that to is not healthy either. I'd like to see BTC hover around the 4000's for a couple of weeks before it's next leg up. It needs to build a solid base, otherwise the swings will be lethal.