A cryptocurrency is a fintech (financial technology) solution that powers the secure exchange of digital assets between parties.
No cryptocurrency is great in all areas—not even bitcoin. But each one uses a set of technologies to have a solid combination of all of these said properties.
Compared to commodity, commodity-based, and fiat currencies, cryptocurrencies are supposedly the least prone to mismanagement and abuse. Centralized entities (whether they be public or private in nature) can’t directly control cryptos.
Markets determine the prices of cryptocurrencies. But they gain more value as more people use them.