I would say that those who jumped on the bandwagon back in the winter when it was over 15k may have gotten hurt, but not bankrupt. That's what happens when you run into a burning building. The trend was already bending to near maximum peaks but sometimes people make decisions based on emotions while investing and get into a trade before carefully and rationally analyzing it. I've done it myself enough times to recognize it.

Also, there have been people getting hurt because of exchange hacks, but that's about all that comes to my mind. Bankrupt? Please tell us more.