A call option is a financial contract that gives the buyer the right, but not the obligation, to purchase an asset at a specific price, known as the strike price, before a set expiration date. In the context of cryptocurrencies, this means you can secure the right to buy a certain amount of a cryptocurrency at a predetermined price.Investors use call options when they anticipate that the price of a cryptocurrency will rise. If the market price exceeds the strike price, the buyer can exercise the option, purchasing the cryptocurrency at the lower strike price and potentially selling it at the higher market price for a profit. If the market price does not exceed the strike price before expiration, the option may expire worthless. The buyer only loses the premium paid for the option, which is the cost of acquiring the right. This makes call options a popular strategy for speculating on price increases while limiting downside risk.