This work aims to determine the key trends and propose an educational model in a decentralized Metaverse. It realized a query in the Web of Science (WoS) database focused on the keywords Blockchain and its applications, Metaverse, and e-learning or education. It ran the VOSviewer software to identify the principal authors, institutions, and journals and the fundamental trends related to this theme. This topic is relatively novel because it only encountered publications between 2022 and 2023, and the tendency in terms of the number of articles is on the rise because there are more and more online courses and training that include the Metaverse. The first two authors with the most citations and documents are from Singapore. The three prominent universities are from Singapore and China. Moreover, China, the United States, India, South Korea, and Canada are the top five countries with the most documents and citations.

Regarding the principal trends, it identified six clusters related to the application of AI with realities to enhance the surgery world, management opportunities in Industry 4.0, the challenges in education technology environments, the implementation of ML and 6G improving healthcare, the combination between IoT and Mobile Edge Computing, and the mix between Big Data and Deep Learning in virtual worlds. Our educational model proposed to help teachers teach in the Metaverse by choosing a decentralized platform to ensure data privacy in compliance with each country's regulations.

This research includes theoretical implications, enabling the advances of knowledge related to studying more about the utilization of Metaverse integrating the Blockchain and its application and how these technologies could improve education, creating new curious forms of learning. This work contains practical implications, and it aims to train students to learn about content in a fun way and encourage and motivate them to study by rewarding them with NFTs. In our case, it could focus on learning about the analyzed terms Blockchain and Metaverse so that they can apply them when visiting their preferred tourist destinations, so it also has a focus on learning towards tourists. Besides, it contains practical implications for policymakers that could create regulations protecting the parties –students, tourists, or firms– using these technologies.

This paper is not without limitations. It only searched the Web of Sciences (WoS) databases. However, it could be possible for future articles to discover the search in Scopus, IEEE, Science Direct, ACM, or Google Scholar databases. Furthermore, it used the VOSviewer software but could use another program like SciMat. Likewise, future directions could be focused on implementing new forms of gamification to acquire knowledge in the Metaverse, considering data privacy and ethics, and taking care of the environment by integrating AI to establish predictions and know more about the users.

Keywords: Blockchain, Metaverse, education, e-learning, gamification, bibliometric.