I'm a crypto enthusiast, but also a freelance WP developer.
While working on one of my WP projects, I needed to pull Bitcoin and Ethereum prices and show them on a website.
Since I know there are many crypto and Bitcoin bloggers who use WordPress, I've decided to expand this code into a standalone plugin, and offer it for free on the WP plugin repository.
https://wordpress.org/plugins/simple-crypto-shortcodes/
The plugin uses the CoinMarketCap API and can be used to display various data of 11k+ coins on your website.
Among others, this plugin provides shortcodes for getting a price, volume, the percentage change in various timeframes, market cap of the coin...
Since the free API key of CoinMarketCap isn't limitless(~333 requests per day), I've also implemented a caching feature to preserve the API calls.
By writing this post, I wanted to share the plugin with you(officially released today), and also hear your comments and suggestions, as I believe this plugin will be useful to many and would like to improve and extend it over time.