I don't believe anyone can time the market continually well. The book "Anti-Fragile" by Nicholas Taleb does a good job of illustrating the idea that you want a portfolio that will _increase_ by randomness. I do have a large percentage of the portfolio in anti-fragile areas (a type of hedging).

While I'm certain a crash will happen, it might be another year, which could have a ton of gains in it, or it could be tomorrow.