"There are three reasons why I believe the current, ongoing monetary initiatives have a better chance of success than ever before: First and foremost, these money innovations are not attacking the official money system. What they do instead is complement the conventional money system, providing new tools that can operate in parallel with it, without replacing it. That is why I call them 'complementary currencies', and not, 'alternative' ones."
January 1, 1970
https://en.wikiquote.org/wiki/Bernard_Lietaer