Can happen to any poorly written smart contact anywhere.
That's a fair statement with 2 exceptions:
1. Over $50 Million U.S. dollars was "stolen" in this event. This is a terribly big deal.
AND
2. Smart contracts are still new, and so is the language and structure. I wouldn't recommend heavily investing in anything like this until the technology is proven and better understood.
Which means:
Caution, caution, caution.