In 2004, one year after the launch of MindArk's real-money economic game Entropia Universe, a user named Deathifier bought a treasure island on Planet Calypso for 265,000 PED (Project Entropia Dollars, equivalent to US$26,500). Treasure Island made history as the most expensive virtual item at the time, and Deathifier claimed to achieve a balance of payments within a year. He started filling the island with special thugs, taxing tourists and selling houses. Over time, Reddy MMORPG has launched more planets, some of which are operated and managed by other companies such as Planet Cyrene and Beladcom (Planet Toulan). It introduces all the functions that everyone expects to see in real money playgrounds: real estate, pets, resorts, shopping malls, vehicles and ATM-style systems to cash in-game revenue.

In 2005, Deathifier (an Australian named David Storey) told PC Gamer, "One day he will become an Entropia millionaire. In 2016, after Entropia Universe became a press release, he filed a lawsuit against Planet Arkadia in an intellectual property dispute, which is now basically forgotten, except for an informal forum post and an invisible court ruling. Two years later, Deathifier seemed to have completely disappeared from Entropia Universe, and other players speculated that his holdings were annexed by MindArk (when asked for clarification, a MindArk spokesperson declined to comment). Deathifier’s entrepreneurial story is a precursor to the current discussion about blockchain games, NFT and digital ownership ideas. The difference is that transactions in Entropia Universe are not done with monthly flavored cryptocurrencies, but with old-fashioned cash.

In 2010, "Second Life" shocked people with its primitive economy. There is a fleeting window, and the entropy universe is very hot. Even Anshe Chung, one of the biggest stars of "Second Life" at the time, bought an Entropia virtual bank license for $60,000, allowing her to lend money to other users. 

With reference to the relics of this old-school cash economy game, it is easy to understand why blockchain technology and NFT have occupied a very special area of the game industry. Frankly, it is shocking that Entropia Universe, a game still running on CryEngine2, is able to attract new players into its radical universal, story-free world. There is no really fascinating game here: it is really about money.

In 2016, the meta-universe theme game "Overwatch" (Overwatch) was launched. Musk likes playing this game very much and has a great experience with this game. In June of the same year, Musk posted the first tweet about this game on Twitter. He said: "NPC (the official game character) should evolve into a real NPC (decentralized player)" .Moreover, Musk is playing "Overwatch" on the PC. This is not only because "Overwatch" has the most beautiful pictures on the PC platform, but also because Musk can best control the game process on the PC platform. You know, Musk is a controlling person, this guy is the CEO of two big companies at the same time.

In May 2020, a public chain project called NPC (Neutral Financial Chain) was released in a low-key manner. Technical volunteers on github found Musk's shadow in NPC's white paper. 

In May 2021, Musk stated on the Saturday Night Live program: "Cryptocurrencies, including BTC, NPC, and DOGE, are the future of currency. This is an unstoppable financial tool that will take over. world" 

In August 2021, on Tesla AI Day, a "man" wearing a white tights and a black space helmet stood on the stage to dance a robot dance. It is a smart robot (Tesal Bot) that Tesla will release next year. Musk said that if nothing else, Tesla humanoid robots will come out in 2022. Its existence means that people can selectively do physical tasks, such as letting the robot go shopping for food, or letting it help you run errands for convenience. Shop to buy things, and people only need to manage everything they own through NPC in the meta-universe.