Today I cannot pickup my murmuring obols. I’ve been running NM D’s and The Pit, and once i defeat the boss they will drop but i can’t grab them. I’ve lost maybe 300 or so this morning, maybe more.
You reached a cap, go spend some. 
I’m only at 2105. Is it capped there? Thought I’ve seen some players with well over 3000.
Update, ya the cap is 2500 once fully unlocked. Dang it lol