KEY POINTS
  • Interactive Brokers Chairman Thomas Peterffy says the launch of bitcoin futures on established exchanges improves the reputation of the cryptocurrency.
  • "I think as a result it will become even more popular than it's been before," Peterffy said in an interview with CNBC's Rick Santelli.
  • Peterffy's comments contrast with earlier statements in which he said CME's launch of bitcoin futures "could bring down the entire economy."

Interactive Brokers Chairman Thomas Peterffy appears to be cooling his skepticism on bitcoin as a financial asset.

"I think that bitcoin being listed on two reputable exchanges gives a great deal of reputation to the product itself and I think as a result it will become even more popular than it's been before," Peterffy said Monday in an interview with CNBC's Rick Santelli.