Join Date: Feb 2004
Location: Central Florida
Programs: MR PL, Hyatt GP Diamond, HH Gold, UA Silver, WN A-LIst, National EE
Posts: 881
I think that of all the likely BAD scenarios, the one most likely to come to fruition is the disappearance of the US airline. If you are concerned that will also mean the disappearance of the US mile program, then I would act on it.
If it were me, I would likely use the US miles to fly on a UA ticket, if that option is available.
Stevekoe