I wouldn’t worry too much about it. Midtown at night is not the best place to be wearing something flashy, but you’d be fine in other (more residential) parts of Manhattan. It is surprising that this happened on 60th/mad though. It’s a busy block with three high end restaurants. Still, I’d say this is more exception than rule.
+1, that is what makes it even more concerning, if possible ;-) My father's sister has been living nearby (72nd and 3rd) since before I was born (she moved to NYC with her first husband in 1976), and I'd never heard of this type of incident...Sad! ;-)