So says Brett Arends, here:
If you’d invested $100,000 in the Standard and Poor’s 500 index 25 years ago, and stuck it out through all the turmoil that followed, you would have made about $800,000 in profits in return for all your trouble.
Sound good? Try this. If you’d invested in a typical basket of private-equity funds you’d have made $2.1 million. No kidding.