Stocks and need for risk

I commented to a very smart and savvy friend via email yesterday: “Late move against the dollar today.” His response: “Investors need/want risk.” It is the type of response Luke Skywalker would have likely received from Yoda, in Star Wars. I am still pondering the deeper meaning of “investors need/want risk.” But do I really need to ponder? Can’t I simply see it? Absolutely! It’s called the stock market.