put it all in stocks. keep at least a little in companies or funds that are pretty stable, so you aren't going to feel like crap if you have to sell at a loss. the rest in whatever risk you are comfortable with.
i hear the Fake Sugar Dick (WARNING, NOT THE REAL SUGAR DICK!) financial people on radios advising people to keep emergency funds in cash and it drives me rough ridin' crazy. who the eff has emergencies so sudden and unforseen that you can't wait to sell your stock in time to cover them, and also so large that you can't credit card them? no one, that's who. and you're just supposed to have thousands of dollars sitting around losing money for your entire life? that's Fake Sugar Dick (WARNING, NOT THE REAL SUGAR DICK!).