It is very interesting to ask questions like these, if you intend to venture into the world of cryptocurrencies or if you are already involved but do not understand very well what gives value to cryptoactives.

Cryptocurrencies basically have value for their technology; The price variations of the same depends on the speculation of investors in the market (supply and demand). 

In other words, the more people who want to accumulate and/or trade a cryptocurrency, the higher its price; On the other hand, the less interest there is in people, the less value it will have.  

It is important to note that cryptocurrencies obey with all the properties that money should have, such as:

📈📉 Its value depends on supply and demand.

🌍It works as a universal means of payment.

🛒It is a store of value (another good can be acquired).