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Economic systems play pivotal roles in the metaverse. However, we have notyet found an overview that systematically introduces economic systems for themetaverse. Therefore, we review the state-of-the-art solutions, architectures,and systems related to economic systems. When investigating thosestate-of-the-art studies, we keep two questions in our mind: (1) what is theframework of economic systems in the context of the metaverse, and (2) whatactivities would economic systems engage in the metaverse? This article aims todisclose insights into the economic systems that work for both the current andthe future metaverse. To have a clear overview of the economic-systemframework, we mainly discuss the connections among three fundamental elementsin the metaverse, i.e., digital creation, digital assets, and the digitaltrading market. After that, we elaborate on each topic of the proposedeconomic-system framework. Those topics include incentive mechanisms, monetarysystems, digital wallets, decentralized finance (DeFi) activities, andcross-platform interoperability for the metaverse. For each topic, we mainlydiscuss three questions: a) the rationale of this topic, b) why the metaverseneeds this topic, and c) how this topic will evolve in the metaverse. Throughthis overview, we wish readers can better understand what economic systems themetaverse needs, and the insights behind the economic activities in themetaverse.

Economic Systems in Metaverse: Basics, State of the Art, and Challenges