As I mentioned earlier, in general you get the most benefits from being diversified broadly. There are only two reasons why you'd want to invest in technology only. The first would be that you know better than the market what the value of technology stocks is. Given how many experts on Wall Street work 100-hour weeks trying to answer just that question, outsmarting the market in such a way sounds pretty tough to me. The other reason that you might invest in technology is because it is so risky.
Some people love the thrill of a high-risk investment.
However, with enhanced index investing you can increase the risk of your portfolio beyond what the market's risk is and still preserve diversification. I think that is a better way to go if you are a thrill seeker. Thanks to you all for the great questions.