It comes and goes and demands picking winners and losers...but clearly the sector that has the best potential is biotech and drug manufacturing. People are living far longer than the law of nature really intended them too. The law of nature though is catching up and longer lives will only come because of biotech. Three things will provide riches, provided they are discovered. Cures or partial cures for heart disease, cancer, and HIV/AIDS will make some companies and their owners ridiculously and I mean RIDICULOUSLY rich! With the human genome mapped and with cloning-type experimentation being perfected, it shouldn't be too long before some incredible cures are discovered. It takes a long time for them to get through the pipeline, but imagine the payoff. If someone created a way to simply rejuvenate or regenerate diseased heart cells or brain cells, their profits could make them the next Microsoft.