It has been a big year for cryptocurrency. Bitcoin is worth six times what it was 12 months ago, and the joke currency Dogecoin has seen a hundredfold increase in price. A boom in “non-fungible tokens”, or NFTs – tradable tokens based on the same technology as cryptocurrency – is transforming the art market.
With this growth has come renewed scrutiny, with critics attacking Bitcoin in particular as a speculative bubble that uses vast amounts of electricity and produces no real…
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