A Metaverse is a conceptual virtual world that incorporates ideas from the Internet, augmented reality, virtual reality, artificial intelligence and other state of the art technologies. It is considered a union of all the advances in the state of the art in technology, where a virtual world inhabited by real humans who use software agents, augmented reality, artificial intelligence, human/hardware interfaces and other futuristic (though real) technilogies to interact with each other.
Cryptocurrencies add yet another powerful digital tool to the Metaverse concept, allowing for 100% decentralized payments to be made securely in a virtual world where real work is achieved, real commerce is performed and other real life experiences happen using technology as a tool.
According to Wikipedia, Metaverse stands for meta universe and the term was originally coined by author Neal Stephenson in his 1992 novel Snow Crash.
There is a cryptocurrency called Mataverse which was founded in 2016. Their official website describes Metaverse as:
Metaverse is an open-source public blockchain that aims to provide digital assets and digital identities. Through Blockchain-as-a-Service (BaaS), we make convenient, secure digital financial services accessible to all Internet applications at virtually no cost.
The Metaverse crypto is a combination of the MST token, virtual reality avatars and digital identities, oracles and on-chain exchange. Oracles, according to their definition, are intermediaries and supervisors for virtual services.