This is the first time that I have played an Elder Scrolls game on a console and I find myself getting really burned out. I've done nearly everything. I have all of the achievements, all of the major quests completed, am level 59, own several houses, have enough gold and loot to be set for life, found and cleared almost all of the locations, etc., etc. At this point on the PC version I would start downloading mods and start fiddling with the console.
I need to build a gaming computer...

I just figured that there would be some continuing reason for the dragons, but sadly, no.

Of course they have gold. Haven't you read The Hobbit? Spend your coin on training. That makes it go pretty quick.
Actually, once you get to a high enough level, finding trainers becomes much more difficult. Once you get to about $100,000 gold, it is REALLY difficult to get rid of!