We'll see a lot of these kinds of hacks for years to come, probably. I wouldn't be surprised if we hear about at least one of these per month as long as Bitcoin remains above $1,000, especially considering the sheer reward of the action if they are successful with their theft. There's simply not a good enough reason to not try and hack an exchange for those who know what they're doing in those kinds of sectors, and in most cases, they won't get caught if they cover their tracks enough.
It's a sad fact that hacks do occur these days, but there's always a chance that it will taper off one day. That's what I am hoping for, overall.