First descriptions of a functional Cryptocurrency appeared around 1998, and were written by a person named Wei Dai. They described an anonymous ...
source https://www.google.com/url?rct=j&sa=t&url=http://www.theshirtdr.com/jieush2if/trcbuekt.php%3Futuxewcr%3Dcryptocurrency-debit-card&ct=ga&cd=CAIyGmM2Nzk3ODA2ZWViNjVjODI6Y29tOmVuOlVT&usg=AFQjCNHDWMfnyhhB8zunBr5yjTcOhl_s9Q