Its universally accepted that the markets offer the best financial gains over an adequate period of time. That doesn't mean you just jump in like many buy and hold investors do; although over enough time, even they make out.  The market has made higher highs for some time now and even the pyschological 12000 dow barrier has been pierced. 

Its time to get long the right way or risk the market going up, up and away with you on the sidelines. Allow a setup to form and enter the market using money management. You should enter the market in steps in the event the market goes against you. If your proven right and the market goes up, continue to add. If the market goes against you, exit the position and let the market resolve itself. Its immeasurable how powerful this concept it, but few execute it. Remember the best traders are wrong at least 30-40% of the time.