Second, money chases problems. If you're able to solve a problem it's likely you'll be able to find money from investors to grow and make your solution as available as possible. The fundamental problem here is that the problem has to be worth solving, and many are not such as purchasing animal food on-line (pets.com).
Three, as solutions are optimized they become commoditized lowering the opportunity threshold and thus profit margins, and at some point are subsumed by the "system" to which the solution was originally applied. Think of enterprise resource management, supply chain management, and customer relationship management as examples of technologies which are becoming commodities as their growth in the cloud SaaS market expands.
Four, computing power continues to grow at Moore's law. Even if it slows down it won't matter because everyone will agree what we can do today in computing will be dwarfed by what we can do in 10yrs, and that by what can be done 10yrs later, etc.
Five, gold is valuable because it is real. US dollars are less valuable because their value is based on the esoteric idea of the US economy. You cannot trade in a US dollar for its equivalent in economic activity, and every investment in US dollars rides the roller coaster of confidence. However gold has been and continues to be valued by everyone universally. If paper currency was truly valuable, it's value would fluctuate in synch with other valuables rather than being counter-cyclical.
My prediction is over the next 50yrs the US economy, followed by the global economy, will make a shift from providing services back to providing goods. I do not foresee a return to the 1950's manufacturing dominance of the United States. We are a global economy good, bad, or indifferent and other countries will participate. However as our focus on the value of information is optimized over the next few decades there will be a tremendous amount of money available, poured into the market to drive innovative solutions. Those solutions will move the technologies into the mainstream driving them toward commodities until, finally, the solutions will become indistinguishable parts of their parent "systems". All of this new knowledge will enable companies to design, build, and deliver better products. The computing power will be available to do things we have not even dreamed of today beyond real time monitoring of the social web to identify a purchasing opportunity and deliver a customized offer with details, pricing and near immediate availability all within a second or two. Information companies will have a difficult time competing because everyone will have access to the same information and analysis tools. Investment bankers, brokers, consultants will all become the professions of bygone eras as the world turns to differentiation through the real-time application of knowledge. The value of information will drop like US currency and the value of goods, things you can put your hands, will rise in value.
I believe the shift will be so seismic that companies will repackage services as products, services getting such a negative connotation. And how we consume those products will be such a bold new model we have a hard time wrapping our heads around the idea of nanobots and technologies augmenting our human nervous system.
What I don't predict is mass employment in this new model. Employment will continue to drop as productivity grows. Unfortunately that's also a reality of economics. However I believe children born after 2020 are going to have to be equally skilled in managing information and managing the production of goods.
Of course I could always be wrong....