I have the late model coin holder below the dash... where any passerby can see.
I used to never lock my Jeeps, especially if they had the soft top on. Only time something got stolen out of it they stole the change I kept in front of the cup holders in my JK. I had some more valuable stuff in there, too, but they left that alone.
Incidentally I had some cheap Chinese tail lights that were also stolen off my JK not long after that. That's all that's ever happened to me in my nine years of Jeep ownership.