I've seen from posts on the forum that there is a plan to introduce new items to the coin shop. I've also heard that some people are sitting on large piles of coins and that this is problematic. I suggest that, to remove some of the coins and give people a way to spend coins on an ongoing basis, that some items in the coin shop are "subscription" type things i.e. you get access to X for a period of 14 days or something like that.
I have no ideas for what in particular coins could be spent on in this way (and I do recognise that this is not enormously helpful), but I am making the suggestion because of public comments that new items are being considered.