Very true, security is number one, priority security in order to make the user comfortable, blockchain XEM is very helpful in this job.
Multisignature is a very easy to use and great feature.We still don't know all the circumstances off the hack/inside job or whatever it really was in the end. I really hope there will be some clarity and the other exchanges took it as some sort of lesson for their own hot wallets. I really hope that such an incident won't happen in the future. But I am quite certain since no one, except maybe the foundation holds that huge amount of XEM