This CryptoCurrency Tracker was created using React with Hooks, and uses Axios to access the CoinGecko API.
I used a tutorial by 'Brian Design' to help build this app as an exercise to gain more experience using Hooks and to get familiar with the CoinGecko API.
CoinGecko has a very straight forward, free API that provides comprehensive and reliable cryptocurrency market data.
More information about the CoinGecko API can be found here.