I wouldn't be too sure. As far as I know there's only 5 people in the world currently holding 1000 BTC coins with intact holograms.
Well, there can be only one full set.
To be clear, only 1 500BTC bar exists. Only two were made, and one was redeemed.
Technically, the one full set would require both 500 BTC bars, as they are from different versions.
I happened to know that the 500 BTC bar which is redeemed, still has its peeled sticker in place :-)
Far more likely, two sets will eventually be made, one with the redeemed, one with the unredeemed.
I expect coblees 1000 coins to be silently acquired over the coming month.