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2. Digital currency - Wikipedia

   en.wikipedia.org/wiki/Digital_currency

   Digital currency. Digital currency ( digital money, electronic money or electronic currency) is any currency, money, or money-like asset that is primarily managed, stored or exchanged on digital computer systems, especially over the internet. Types of digital currencies include cryptocurrency, virtual currency and central bank digital currency.

3. Digital card - Wikipedia

   en.wikipedia.org/wiki/Digital_card

   The term digital card [1] can refer to a physical item, such as a memory card on a camera, [2] [3] or, increasingly since 2017, to the digital content hosted as a virtual card or cloud card, as a digital virtual representation of a physical card. They share a common purpose: Identity Management, Credit card, Debit card or driver license.

4. Digital gold currency - Wikipedia

   en.wikipedia.org/wiki/Digital_gold_currency

   Digital gold currency (or DGC) is a form of electronic money (or digital currency) based on mass units of gold. It is a kind of representative money, like a US paper gold certificate at the time (from 1873 to 1933) that these were exchangeable for gold on demand. The typical unit of account for such currency is linked to grams or troy ounces of ...

5. How One Man Earned 4 Million Airline Miles by Buying Dollar Coins

   www.aol.com/news/2013-02-28-credit-card-reward...

   The card he used was the American Express Starwood card, which offers 1 point for every dollar spent. He could then transfer them into an airline's frequent flyer program at a ratio of 1.25 miles ...

6. Bitcoin - Wikipedia

   en.wikipedia.org/wiki/Bitcoin

   Bitcoin (abbreviation: BTC; sign: ₿) is the first decentralized cryptocurrency. Nodes in the peer-to-peer bitcoin network verify transactions through cryptography and record them in a public distributed ledger, called a blockchain, without central oversight.

7. Cashless society - Wikipedia

   en.wikipedia.org/wiki/Cashless_society

   Technology scouting. v. t. e. In a cashless society, financial transactions are not conducted with physical banknotes or coins, but instead with digital information (usually an electronic representation of money). [1] [2] Cashless societies have existed from the time when human society came into existence, based on barter and other methods of ...