To buy options in crypto, you need to open an account with a crypto exchange that supports options trading. Once you have an account, you can deposit funds and buy options contracts. There are two types of options contracts: call options and put options. Call options give you the right to buy the underlying asset at a specified price on or before a specified date. Put options give you the right to sell the underlying asset at a specified price on or before a specified date. The price of an options contract is called the premium. The premium is determined by a number of factors, including the strike price, the expiration date, and the volatility of the underlying asset.