With the Bitcoin blockchain, the numbers in Column B represent Bitcoins. And the people in Column A are identified by strings of random characters instead of names. That’s it. That’s what Bitcoins are—numbers in a spreadsheet. There is nothing else. Without the spreadsheet, the Bitcoins don’t exist. If we were talking about the Dogecoin blockchain, the numbers in Column B would represent Dogecoins. Tethers are just numbers in a spreadsheet like this too. (Technically, a blockchain is a list of all transactions ever made, which is compiled into something like this spreadsheet by software, but
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