You can display it for all visitors to see.
But when news gets out-and it will-that you have one, a burglar duo may come by when you are gone.
Believe me, people talk about anything gossipy or unique, and some of the guys who listen are gangbangers and other professional drug users. "That guy has a high-powered assault rifle on his wall" "Sho' nuff?...so where dat dude live...?"
They might believe that it is an AK. Who cares?
A burglary is still a burglary. A widescreen tv and any handgun will also be a primary target. Otherwise, the master bedroom will be the first objective (women's jewelry and hanguns). My wife's stored jewelry was taken. We were gone for just one hour and the entire house was dark; de-powered by yanking out the thick, black power cable in front.
The nice guy who sold me my 'cherry' gun was offered $300 (sight unseen) for his SKS by a total stranger who appeared to be a gangbanger (if I remember correctly), and the seller figured out that the bad guys always hear about guns. He had only said something at work about about the gun being for sale.
Sold it to me for $200, to protect the gun's condition and keep it off the high-crime streets.