OR, just parcel out land and give people seeds and allow them to trade with nearby neighbors... There's no longer a need for money and everyone gets to eat - which is all we really need. Beyond that, people can help each other build homes in smallish communities. Money, even on a planet with this many people, isn't necessary, because it's like people driving cars - the system works because everyone is operating to keep themselves alive. HN is not a fan of this take.