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Introduction Every day, billions of people buy coffee, groceries, airline tickets, smartphones, and online subscriptions using a debit or credit card. The process feels almost instant. You tap your card. The payment is approved....
In 2009, an anonymous person — or group of people — operating under the name Satoshi Nakamoto released a nine-page document that proposed a radical idea. What if you could transfer money between two...
You deposit £1,000 in your bank account. The bank pays you 2% interest. £20 per year. Then the bank lends your £1,000 to someone else at 6% interest. £60 per year. The bank pockets...
