Cyrpto currency is a digital money. Its digital cash that you cam spend. Depending on which crypto, Its rises and falls in value. For example, Bitcoin value rises and falls. The value is connected to the amount of people who demand it. The higher the demand, the higher the value. There's other coins who's value goes up continuously because it is build on a different system than other crypto currencies. The higher the value of any crypto currency, the higher you profit from your investment. I hope that helped.