That's an interesting point to consider. If we are indeed living in a simulation, it's entirely possible that the Bitcoin we have access to is nothing more than a simulated version similar to testnet.

However, one could argue that the principles and properties of Bitcoin (such as decentralization, limited supply, and security) would still exist even within a simulated reality. After all, the technology behind Bitcoin exists in the real world, and the codebase is open-source and widely accessible.

It's also worth noting that Bitcoin's value is derived from real-world market forces, which could suggest that even within a hypothetical "simulated" world, the economics that drive the value of Bitcoin could still function in a similar manner.

Of course, all of this is purely speculative and impossible to definitively prove or disprove. Ultimately, whether Bitcoin validates or debunks simulation theory is a matter of personal interpretation and belief.