Aging population and growing population

Yes, all sectors and even the market have cycles. My books have hints on how to take advantage by using technical indicators. Most likely, no one can spot the peaks and bottoms precisely. Some did and became famous, but very seldom they repeat.

The population problem is not solved by oil. It will be solved by public education and policy. Many African countries have birth rate of over 7 per woman while the developed countries have less than 2.
China's one-child policy is cruel but practical. India will pass China in population. Many academic papers like India's young citizens, but they become a liability than an asset to me.