How about DNA sequencing? Matthew Herper has a spectacular story out this week on DNA sequencing. He predicts it will become the next $100 billion technology business in 20 years. I’m biased because I edited the early drafts of this story, but if he is right this could be the best tech growth investment over the coming decades. It combines two hot trends: 1) the type of technology miniaturization that has driven the computer industry and Internet, with 2) the endless expansion of the health care industry as Americans age.