I have less than 30,000 because I haven't been playing that long. I've used quite a number of them buying items in the nook miles redemption section of the ABD and flying to other islands when I was looking for new villagers to add to my island. I do grind some out every day and now that I have all of my villagers, I have been seeing my nook miles grow. But I have over 8 mil bells, does that count, lol.