What it must adhere to in order for a currency to be global? Maybe, global usage? If that's so, I think the cryptocurrency industry pretty much does.

Hmm... Equal's a tough word. If you mean that it can't rob you, same way banks do, then yes. Otherwise, every enthusiast who found out about it in 2011 is already above an enthusiast of 2021. It has a hierarchical shape, we ought to admit it.