Ok i need an advise from all you guru's.
What to do with your miles do you use them or keep piling them up like george clooney was doing for some extra perks as it keeps on showing in you account?

And if you use it then do you guys prefer use them on ugrades or to get a economy class ticket?

I have around 130k advantage miles sitting around but need an advise that either keeping them is good or just keep on using them as soon as i am availabe for award?

Another thing is do the airlines really care about how many miles you have in your advantage account or it all depends on your advantage status?

Any input willbe appreciated.