Once the rules are settled, speculation regarding the potential for investment-based crowdfunding is astonishing. Some experts believe that equity crowdfunding could grow to be a $300-billion industry, but there are high hurdles to jump to get to that level, such as legal and cultural barriers to get past. "I think it's realistic, but you really have to look out not months, but years -- many, many years," angel investor Chris Camillo said at the inaugural Crowdfund Texas Conference in Austin. That said, Camillo, in an interview with TheStreet on Wednesday, said CircleUp's sector-specific focus is a good bet on the future of crowdfunding portals. "Specialization is at the core of crowdfunding portals," Camillo says.