Today, digital currencies are back in the red. Robin Hood reports a surge in revenue in the third quarter driven mostly by its crypto business. And Kraken's co-CEO David Ripley discusses crypto regulation and the company's IPO ambitions from the Ripple Swell Conference in New York City.Welcome to CNBC's Crypto World. I'm Brandon Gomez. Digital currencies are facing another pullback as the volatile week in trading continues.By noon Eastern, Bitcoin was in the red, but holding on to the $100,000 level. Ether ...