OK, so I'll generate a new receiving address every day. You don't know the age of my wallet, all you can know is the age of the receiving addresses. You don't even have any idea what receiving addresses belong to my wallet. And even if you did know the age of my wallet and all of the receiving addresses inside of it, I can always just generate a brand new wallet whenever I wanted.
doesnt matter. when transaction fee is a steady function of time transferring your coins to a new address every day will cost you as much or more than just keeping it where it is.