HowStuffWorks (Dec. 1) -- Andrew Miller is an assistant professor of electrical and computer engineering at the University of Illinois at Urbana-Champaign and associate director of the Initiative for Cryptocurrencies & Contracts. He thinks the bubble talk is irrelevant. What's more important is that investor speculation is fostering rapid innovation, creating hundreds of "really exciting experiments" in the form of new cryptocurrencies, each with unique functionalities.