Here's what happens when capitalism is deregulated

Enron

Remember the 2005 Documentary, Enron - The Smartest Guys in the Room?  [It's currently available on Amazon Prime, & probably elsewhere as well.]  Remember Ken Lay and Jeff Skilling?  Remember the criminal fraud?  Remember how many people lost their pensions?  Remember the concealment of Enron debt?  Remember the rolling blackouts in California due to the fraudulent manipulation of available energy by Enron "Traders", and the high price of electricity?  Remember how several Enron Executives each secured a Golden Parachute retirement just before the company bankruptcy?  It's all detailed in this riveting film.

Enron was founded in 1985 at the height of the Reagan-Thatcher Neoliberal DEREGULATION ERA.  The Execs in high positions soon developed totally bizarre financial derivatives/instruments/systems for Trading fossil energy.  Later, they appeared to be making massive profits for the company...because they were hiding massive debt.  The whole ponzi-like house-of-cards eventually collapsed.  The lives of hundreds of thousands of people (not only thousands of Enron employees, but employees in other companies, and consumers) were damaged significantly.

The 2007-09 Crash

Remember the 2015 film which dramatized the (commonly called) 2008 Crash, The Big Short with Christian Bale as Dr. Michael Burry?  Weird (and unregulated) private financial derivatives*** caused a financial meltdown felt around the world.  Real estate companies, banks, Wall Street Traders, bond rating agencies, and others all contributed to creating the fiasco.  The groundwork for it all developed during the Clinton Administration CORPORATE DEMOCRATS ERA and the Dubya Bush DEREGULATION ERA.  Millions of people were severely impacted.

***During the Bill Clinton Administration/Presidency, an attempt was made by Brooksley Born (Head of the Commodity Futures Trading Commission - CFTC - and an American Hero) to have such derivatives regulated by the CFTC.  Wall Street, Alan Greenspan, Larry Summers, and many other Clinton Admin officials fiercely and savagely opposed her efforts, and they won.  Too bad for Main Street, again.  Even today OTC financial derivatives are barely regulated, especially those used by securities & insurance firms.

Bottom Line

When combined with various public functions and facilities in a Mixed Economy, and when closely regulated, I believe Capitalism is a valuable economic system.  Unregulated, or even deregulated just a bit, Capitalism is a monumental disaster and an extreme danger to Main Street.  History supports such a contention.  Too bad for Main Street that the incoming Trump Crew is planning to push for unprecedented deregulation.  Too bad, indeed.

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Not only my opinion.  Take Care