Is the crash down to $31k normal during a bull run or did something happen?
Yes it is quite normal for the drop to that range and in fact, it dropped even below I think around 26k or thereabout in last year before it started galloping up again to this current price of 47k. I think btc has performed more than it did in 2016/17 and 2018. The fact that it retained the 5 digit even at it bear last year and previous year, it shows that the bull this time around will be a memorable one, probably in 6 digits as speculated.