The stock market is going to crash one day, of that you can be sure. Stated another way, Morgan Housel recently wrote at the fool.com:
Markets crash all the time. You should, at minimum, expect stocks to fall at least 10% once a year, 20% once every few years, 30% or more once or twice a decade, and 50% or more once or twice during your lifetime. Those who don't understand this will eventually learn it the hard way.
Well said. The question is, “”How will you deal with it?””