The Royal Safe Event in Crime City

A new event has started and it appears my luck is already running out. Like so many of these events I got the first 5 items “Crown Jewels in this case” without too much trouble, but now it has turned into frustration as a each “Safe” reveals, “Better Luck Next Time”. I’ve managed to get the Safe Gripper Gloves, but if I make it past 10 and get the Makeshift Blaster, I’ll be stunned. Oh well, it’s free swag and I’m not going to pay gold to get anything, I’ll save that for buildings. Besdies, does gold guarantee a Crown or just that the box opens and you get something?