As you already have been advised, you can choose to create a token and not a coin in this, also know all the required technicalities in doing so and the financial demands one will require to fulfil before he can establish creating one, just as we can view from the most performing currencies are those with higher market capitalization, so you may have to think about this if you're capable or will look in for collaboration in launching for such.
read more on this
https://cointelegraph.com/learn/a-step-by-step-beginners-guide-to-creating-your-first-cryptocurrency-tokenI think I would need a proof of stake, the stake being the time running the server without interruptions
Can tokens also be proof of stakes?
Yes. Tokens can certainly play a role in a Proof-of-Stake (PoS) system. In fact, that's a very common model for how PoS blockchains operate - by using native tokens to facilitate consensus and verification.
So you're planning to make a completely decentralized virtual world? Well, That's an ambitious goal with many complex technical challenges. However, before diving deep into tokens and protocols, it may be wise to start by nailing down the core game design economics, and incentive structures first. Get those key elements right in a way that supports player-driven economies and community ownership. Once that foundation feels sturdy, then layer on decentralized solutions like tokens and coins that can enhance the gaming experience and community building. That makes more sense to me at least. But in the end, it will still take bold experimentation and likely some trial and error to achieve something so cutting-edge.