Beware the cashless society, as Ben Parry explains fairly well in this article.
"“Imagine what would happen if the government in Syria, North Korea, China, Libya, certain parts of the United States and maybe northern Ireland, whatever society you wish to look at, decides that it can push a button a stop somebody from having a transaction. They can already push a button and stop your master card in a moment’s notice, but can they actually push a button and stop you from buying bread? That’s what the cashless society will do. “
Edwin continues, “These are the Promethean issues that face us with the cashless society, which is merely the next step in a society which is controlled and mass controlled and centralized”."