Gold stocks had a very bad time, then recovered substantially, e.g GOR, from 80c to 4c, now 80c again. RSG was also sold down to 20s due to debt issue, but then recovered to $2/share.
BLK had few roller coasters, from 90c to 5c, then 30c, to 4c in 2014, then fetched $1.10 in 2016, now back to 5c, has already raised $36m cash, next move is likely to be another good run, imo.