Another thought: when did my balance become 1 EGX? At the point I agreed that I had it? Or earlier, when I discovered it existed? Or earlier, when it was invented? Or earlier, when I was born?

If it can be argued that the concept of tune coin was discovered, rather than invented, it follows that my ownership of some of the currency might predate the specification being written. Perhaps all living humans have always had 1 EGX, realised retroactively?