At the risk of being a buzzkill, many times when something like this happens, the law of gravity kicks in and prices come back down to earth. My opinion would be to sell it now, if that's what you want to do; then, when the price comes down, you can buy it back to keep. I'm just thinking of the 1999 silver proof quarters and the 2010 bullion ATB pucks off the top of my head.
Nah, these p pucks are all low, low mintage, even the 2010's. Long term, you'll see very few if any on the market - they'll settle into big boys' collections, who appreciate art and want to hang 280 ounces of silver on the wall.