I want to move my horse to a new yard, but I'm a bit nervous because...?

... about 2 years ago a horse was stolen from there and never found. I'm kinda scared it might happen to my mare (shes worth about $3000, which isn't very much compared to the fact that some of the best dressage ponies in the country are stabled there) but I'm still worried. Do you think moving to this barn would be wise? (If not for that detaile I'd get my horse there right now, its superior to my current yard in thousands of ways, plus some of my best friends board there.)