Historical clue formulations

• Digital money — 2023-12-27
• Bitcoin, e.g. — 2021-03-31
• Virtual currency — 2021-02-28
• PayPal money and the like — 2019-08-25
• Venmo transfer, e.g. — 2019-07-31
• Bitcoin, e.g. — 2018-01-28
• Digital currency — 2017-06-18
• Bitcoins, for example — 2016-12-05
• What Google Wallet uses — 2016-07-22
• Digital money — 2015-10-11
• Online outlay — 2013-07-23
• PayPal funds, e.g. — 2013-06-06
• Digital dough — 2013-03-07
• PayPal money — 2013-02-14
• Online money — 2010-08-30
• PayPal money, e.g. — 2010-05-18
• Direct deposits, e.g. — 2009-06-19
• Online currency — 2007-10-24
• Online shopper's expenditure — 2006-06-14
• Online shoppers might use it — 2006-01-01
• What online shoppers may spend — 2002-12-12