Fulfill Multiple Purposes
Currencies are most effective when they facilitate a convergence of flows across multiple dimensions of needs.
Examples: Curitiba Trash Tokens both cleaned up the community AND connected people with important resources and services (transportation to the city where there are jobs).
when addressing a need/problem, find additional dimension/force to drive cycle (connect previously disconnected needs and resources)
- gravity and evaporation in water cycle
- Transportation and health in Curtiba