You must find, build, or have something that people want. Your goal is to create sustainable and frictionless sharing mechanisms.
Ideally, the want becomes a need. Then you expand the need, start over, or step aside.
But there are big problems. Constraints and timescales are often inhuman. People frequently misunderstand themselves. They rarely internalize the game.
Incentives point many ways. And everything is built upon the individual.
There are also big opportunities. Whom do we serve and to what extent? How about society? The future?
We don’t really have any alternative systems. And nobody can answer for you. (Yet.)