Although it seems like science fiction at the moment, from the logic of technological development, it indeed touches on the core of human social evolution.

We can deduce this future from several levels:

1. Work evolves into interest: from 'making a living' to 'self-actualization'

This requires technology to liberate humanity from 'laboring for survival.'

· Material basis: General artificial intelligence and comprehensive automation are key. When AI and robots can efficiently handle agriculture, industry, and even most service sectors, the essential goods for human survival will be greatly enriched, eliminating the need for large-scale compulsory labor.

· Changes in the Nature of Work: Work will strip away the function of 'earning a living' and return to its essence—creation, exploration, and collaboration. People will pursue research on stars, create art, and explore science out of passion, turning work into a hobby like painting or sports, seeking a sense of achievement rather than a salary.

2. The Dissolution of Currency Meaning: From 'medium of exchange' to 'credit record'

If basic survival goods are abundantly available and work is no longer for survival, the value scale of currency, core functions like the medium of exchange, will be drained. However, resource distribution still needs rules, which may evolve into:

· Resource Allocation on Demand: Essential goods will be as free as air is now, obtainable with identity information.

· New Measurement Systems: Currency disappears, but new systems are needed to prevent abuse and major decisions. Personal credit, social contribution, or environmental points may be used to measure, determining who can prioritize experiencing scarce resources like Mars travel.

3. Social Dynamics Reshaping: Goals and Meaning

When survival is no longer a problem, the greatest challenge humanity will face will become 'why live'.

· Intrinsic Motivation: People will wholeheartedly engage in what they love, driven by curiosity and a sense of honor. Scientists, artists, and explorers will become social role models.

· Competition and Cooperation: Competition will shift from the struggle for material goods to a contest of intellectual achievements, artistic creativity, or social influence. At the same time, to tackle grand challenges such as space exploration and environmental transformation, human cooperation will reach unprecedented heights.

4. Challenges and Real Obstacles

To realize this vision, one must overcome numerous obstacles:

· Technological Bottlenecks: We are still far from achieving superintelligence that can replace all physical and mental labor.

· Distribution Challenges: How to smoothly transition from a society with current resource scarcity to a post-scarcity era is a huge social engineering task.

· Humanity and Fairness: How to define and fairly distribute 'contribution'? How should society treat the few who do not want to create and just want to lie flat? All of this requires a new ethical system.

· Power and Governance: Who controls the distribution system? How to prevent new forms of centralization? This requires a completely new social contract.

In summary, 'work becomes interest, currency loses meaning' represents an ultimate ideal for humanity to free itself from survival pressures and focus on self-actualization. It is not entirely impossible but requires overcoming unimaginable technological, social, and human gaps. Perhaps in the distant future, looking back at this history of striving for a livelihood will evoke feelings of hardship along with a unique charm of struggle.

In this vision of the future, which step do you think is the hardest to achieve?