Please share with us, using your specific advanced knowledge of C++ programming, how you write a “virtual on/off switch” into an open source C++ application, and how you can hide it from everyone in the world.
You know there are forks of Bitcoin, right? Separate installations of Bitcoin that have branched off into entirely different cryptocurrencies and mining networks. Do they have this “on/off switch” too?
Who told you that “anything virtual has an on/off switch”? Like, specifically, where did you learn that, or, who told you this?
Sorry, if it is too good to be true, it is.