The cryptocurrency platform Abracadabra Finance lost about $13 million worth of digital currency to hackers on Tuesday morning.   The company did not respond to requests for comment confirming the amount of stolen cryptocurrency but acknowledged the incident in a message on social media.  The crypto lending platform said the issue was sourced back to a product it calls “cauldrons” — isolated lending markets that allow users to borrow against a variety of cryptocurrencies.  “Core contributors ...