Instruments of derivatives market allow not only to invest in derivatives of stocks, but also of stock indices, oil, agricultural products, interest rates, currencies, and even weather.
Purchase of an option is an investment with restricted and predicted risks. Investor knows that under any circumstances he can't lose more than a certain amount.
Volatility trade makes possible achieving profits in any situation at the market. In case of selling volatility profit is brought by up and down fluctuations of market, and in case of buying volatility purchase if market stays still.