1Broker, Whaleclub, 1Fox used to be CFD trading platforms where you could use Bitcoin for trading. They have since closed down.
If you're looking for good alternatives to these platforms then I would recommend trying out eToro. You can trade a range of CFDs and they now have options for depositing via cryptocurrency.
Looking for other good ways to make money online? Check my guide on how I earn a full time income from blogging.