My mother has about 95K AAdvantage miles, and she was wondering if it's a good idea for her to just use them all now, or save some/most of them for the future (say, 5-10 years from now)? She's planning to retire by then, and since her income will be significantly lower she would have the miles to travel with at that time.

What do you think, use them now or save for retirement in 5+ years?