Cryptocurrency is digital money, that is developed in such a way that it is secure and help easy transactions. Digital currency always makes use of technology. Also there are lots of Cryptocurrency Development Service provider which are creating Cryptocurrencies such as Bitcoin, Litecoin, Etherum, etc. For more:
https://blog.infinitemlmsoftware.com/top-10-cryptocurrencies/Actually it is because of their value. I believe project will be more attractive when the price is higher because thats what people want the main interest of people is the value product is just an assets.