The publication reports that the twins have "amassed since last summer what appears to be one of the largest portfolios of the digital money."
A couple choice quotes from the Winklevii:
Cameron: “People say it’s a Ponzi scheme, it’s a bubble. People really don’t want to take it seriously. At some point that narrative will shift to ‘virtual currencies are here to stay.’ We’re in the early days.”
Tyler: “We have elected to put our money and faith in a mathematical framework that is free of politics and human error."
We recently revisited an interview we did with Bitcoin lead core developer Gavin Andresen, who talked about where the virtual currency is headed. He had a lot of interesting things to say, and you should probably read it.
Also, check out this new video that's been making the rounds, explaining Bitcoin: