We will see what they look like ten to fifteen years from now and then decide if it is a winner. A lot of coins pop up right after the mint stops selling them. Some stay up, some go back down quickly, and others stay up for awhile (years) and then start slumping. I have seen a lot of coins go on big winning streaks and then after ten years or so suddenly start sliding and end up below issue. Look at what has been happening to the 2001 proof set. It has been a high flyer for the past decade but lately it's been tanking. To a lesser extent the 1999 set as well. Right now the Army half is in the flip stage. Only time will tell if it has legs.
the flipper hypothesis does not really work- this had a low mintage because the mint raised the price on the clad .50 coins from $8 to $20- that caused low sales. No one bought these with the idea of flipping them
Heck, most times I don't "buy" with the notion of flipping. Two that I did? Boy Scouts. That was a bust. 25th Anniversary ASE set. Hit a home run with that one.