There have been any number of attempts to make a negotiable currency. All but one of them have been created by governments who started from the same premise. The currency they created was based on the value of the currency itself. In other words, it started out as gold and silver and slowly went downhill from there. The gold led to silver which led to debased valueless metals which led to paper backed by gold, then paper backed by silver, then paper backed by the full faith and credit of government which led to paper backed by nothing at all.
Who would have thought that in this day and age some guy could just come up with his own currency and get it adopted around the world almost overnight? Oh well, some people persist in believing that there is some detectable difference between the two dollars shown above.