Easy way to check! 1) www.youtube.com 2) Search "coins worth tons of money" 3) Click away (That was a joke....) Not that I've heard of, but I've also been a bit out of the game of a bit..
There is a DDO on the Apollo commem, both the business strike and proof versions. That's pretty cool, because you don't find DDOs very often on commems or proofs: http://varietyvista.com/2019PDDO002 Apollo 11 dollar.htm
Last year it probably would’ve been the lightly frosted 2018-S reverse proof Kennedy Half Dollar. I don’t know if it’s still as hyped as it was last year.