Bitcoin bears are being unleashed onto the cryptocurrency's futures market

David Ryder/Getty Images Interactive Brokers is now letting its users go short on bitcoin in the newly launched futures market. It'll give investors a vehicle by which they can bet against the future price of the coin, which is up more than 1,600% this year. One of the largest brokerages is letting its clients short bitcoin, giving folks bearish on the coin a way to bet against it. According to reporting by Bloomberg News, Interactive Brokers will let clients take short positions in the Cboe Glo...