A good team can consistently finish floors around ~13 minutes and less. It'll be something around 400k xp/hr, but I don't remember the exact rates. So a chaotic every 5 hours or so, and it can be faster than that. I want to say it'd be around 10m-20m per chaotic but I have a feeling the stupidity of the population will force the prices up. These are people willing to pay 2m for a slow dg floor.
There are also a lot of people with a surplus of tokens. I got 200m dg in April and I still have 11m tokens. So it's not as if there wouldn't be many chaotics in circulation