Check this post out and look for the post by Meis
http://forum.topeleven.com/top-eleve...tml#post344476
Meis has been playing a lot longer and at his level there are not so many active players so he does not promoted every season. But now with more players it is more unlikely to happen. Therefore my answer is that it is unlikely that you will reach a level where you do not have to invest in your team to improve it to be competitive. However, there will come a point when you may have to rest on your laurels for a season or two in order to replenish your tokens so that you can be competitive again.