“One million dollars straight in crypto, in cold storage,” said hedge fund chief Bobby Axelrod on HBO’s Billions in May, handing a mysterious-looking USB stick to his loyal lieutenant. Rather than PDFs, the stick contained the key to a Bitcoin wallet, an untraceable 21st-century payoff for services rendered. This isn’t some made-up TV tech either. The stick is called a Ledger Nano S, and it’s a real product from a French startup that could soon be Europe’s first crypto unicorn.
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