While I have entertained the notion...I don't have any safes at all.
I make my own wall hangars with scrap pieces of 1x4 and 3/4" dowel pieces....and keep them all on display.
That way I can enjoy them the 99.999% of the time I am not firing them. It also prevents me from buying more guitars...I have very little wall space left.
I don't have small children over...very few friends who come all the way out here to visit, and folk who are offended by them even less. Our neighborhood is pretty crummy...but it's mostly conservative poor white trash who respect their neighbors, and also expect everyone to be well armed. If I lived elsewhere, I would likely be more likely to keep things under lock and key. Security cameras covering the entire property also lend some piece of mind, for those very rare occasions when someone isn't home.
It doesn't hurt to be scary looking...I was recently described as a 'biker-type' by one of my daughter's boyfriend's mothers. I guess my ancient Polaris and Kawasaki quads make me look tough.