I have a Citi/AA card with 110K in miles that has already been credited to my AA account. I want to change my CC to another Citi card and have been told that I will lose my 110K miles in my AA account if I don't use it within 4 months. First, has anyone had a different experience and or ability to change to another Citicard and keep their AA miles?

Secondly, what's the best use of AA miles if I don't have any upcoming trip plans? Looked into exchanging it to gift cards, but looks like I will be getting $400-$450 in Target gift cards, for example, and it doesn't look like a good deal.

Any help is highly appreciated.