If you’re waiting for bitcoin to slowly fade from the spotlight, keep waiting. Now that the cryptocurrency has taken another step into the mainstream with the CBOE offering bitcoin futures trading, the buzz is only going to keep building. And, if one of bitcoin’s biggest — and wealthiest — backers has it right in our call of the day, building buzz means a building valuation. Cameron Winklevoss, half of the twins made famous by their role in Facebook’s FB, -0.03% early years, told Bloomberg he believes bitcoin is a “gold disruptor” that could see 20-fold gains. He bases his hugely bullish projection on a $6 trillion market value for gold GCG8, -0.11% explaining that investors appear to be warming up to the idea that bitcoin is more portable and divisible than the precious metal. “We think it’s just the beginning. We are definitely holders,” Winklevoss said. “We think we are in a good spot and ready for game time.”via