As many experts... as many opinions.
Hard to argue that any one of us is smarter than those who earn their living by managing money ... as a profession.
Still, IMHO, not an absolute reason to continue without at least looking at other possibilities. A 40 year lookback at the DJIA. is something to keep in mind, when looking at the future. and a simple statistic should be meaningful in developing a wider perspective of where we are as a nation, financially speaking.
https://www.google.com/search?newwindow=1&tbm=fin&q=INDEXDJX:+.DJI&stick=H4sIAAAAAAAAAONgecRozC3w8sc9YSmtSWtOXmNU4eIKzsgvd80rySypFBLjYoOyeKS4uDj0c_UNkgsry3kAQ0pLYDgAAAA&sa=X&ved=0ahUKEwiDhv2q-7LcAhVM94MKHdy7Aq8Qlq4CCEAwAQ&biw=1152&bih=625#scso=uid_tZpUW-WdJJSzjwSAxrzQAQ_5:0
Four hundred individuals own more wealth than 164 million Americans.
US debt is rising exponentially.
A current article from peak prosperity brings some of the major perceived problems together. Whether to believe the article or not, is a choice, but at least, points to accept.... or not.
https://peakprosperity.com/blog/114209/america-insolvent
My own concern is based on the safety of the rules covering investment, and the risks that remain open for the manipulation of the markets. I just deleted a very long post covering the abrogation of SEC controls put into place back in 1934, and since changed many times. Very long and complex rules to prevent moneyed interests from manipulating the market through short term buying and selling .. think SEC rule 10B-18.
The most recent concern about the easing of controls comes from this letter:
https://www.baldwin.senate.gov/imo/media/doc/Senators%20Letter%20to%20Clayton%20on%20Buyback%20Rules%20FINAL.SIGNED.6.28.18.pdf
The other oversimplified question that I have, is how the $ trillion increases in our National Debt over the past year have affected the current strong economy.
https://statista.com/statistics/273294/public-debt-of-the-united-states-by-month/
That and the interest we pay on our national debt.
https://thebalance.com/interest-on-the-national-debt-4119024
So yeah, I know this sounds really negative, and flies in the face of a booming economy. I wish I could chalk it up to fake news, and perhaps it is... I just wish I was on the board of directors for AppLovin. Maybe I could join the 400.
Whether the market manipulation of 1929, or the housing bubble of 2008... the market changes came as a surprise to most investors. I believe that having some overview of the macro economy, might help... just in case.
edit to add... If I figured correctly, in the past ten years, while inflation has increased by 15%, the average American Citizen's part of the national debt dept has increased by 88%.