Because, at that time the study makes our brains have digested the lesson before more maximal than with a night at a time when our bodies are already tired with the activities of the corpse. I recommend to learn in the morning.
People growth is country and economy growth. So if want to check the country growth. First check the country people growth. Then easy to get the country economy growth. So country will be help to country people growth and improve the knowledge.
Now bitcoin is help to future growth and help to improve the people knowledge. It connect the other country people. So it easy to use and learn more of the future growth and get more project. Economy is part of the country. It not currency. So don't this this currency.