So I decided to show a couple buddies at work one of my gold Double Eagles. I just put the slab in my front pocket and that's where it stayed most of my 12 hour day at work.
When I got home I realized the hologram faded away. I'm guessing this was a combination of heat, moisture (sweat) and movement (I do concrete construction for work). I was already planning on having this particular coin sent back to NGC to be put in a modern Edge View scratch resistant slab anyway but I was still surprised to see the hologram melt away like that.
About how long does it take to get my coin back