From the Eleanor Roosevelt papers...
"I have read that many high-school students listen to the radio two hours or more a day, and some as much as six hours a day. I think most radio programs are a shocking waste of time, but don't know how to keep my daughter, who is a radio fan, from doing what her friends do."
You have made a statement, and have not asked a question. However, I gather that what you want to know is whether it is wise for young people to spend a great deal of time listening to the radio.
It depends almost entirely on what they listen to and, like everything else, it is a question of moderation. There are certain things that most of us have to do which require concentration, and which will not permit distraction by the radio, and it is better to shut off the radio when working on them. There are many times when the radio will not only give you a good program, but will furnish you with a feeling of companionship, which is sometimes sorely needed. I should preach moderation and common sense in the use of the radio, but not be too definite about the number of hours or minutes that young people may spend listening to the radio.
Ed McQuarrie talks the REAL History of Stocks and Bond performance.
https://www.morningstar.com/portfolios/how-use-commodities-your-portfolio?utm_source=eloqua&utm_medium=email&utm_campaign=FundSpy&utm_content=None_61962&utm_id=32070
How Commodities funds can help diversification with Stocks and Bonds and usually not correlated to either
https://www.morningstar.com/funds/most-stunning-fact-about-vanguards-etf-flows-2
This article shows people are pulling money out of mutual funds and putting it into index funds an example is VOO. Also Vanguard Primecap and Core fund opened the fund due to them both because of money being pulled out. INDEX ETF's way to go tax efficient and low expenses