There was a tremendous lack of space is the answer. In the early city almost all of the open spaces, excluding those in the federal zone, were housing settings. Lack of transportation obligatory people to live close their place of service, occasionally in the same construction.
Answer:
as prices rose, less and less people were able to buy things,
unsold things piled up, so there was no need for production
in all, no one was working or buying, and this caused the economy to crash
I would guess gathering food and hunting, although sleeping might also be N1
