[A]ll individuals can still choose to do what most professionals no longer can: Invest for the long run without having to measure their performance moment to moment in a mad race to beat the market.
But if, instead, you use borrowed money to speculate in markets you
don’t understand, you have taken your basic advantage and distorted it
into a lethal disadvantage.
-Jaxon Zwieg, in an article entitled "Still Want to Trade Currencies?" in today's WSJ. (Behind the pay-wall.)