This is a tool to show the current cryptocurrency prices in a nice ticker format for use in tmux. When used in the one-shot (short-lived command) mode that tmux prefers, prices will be cached automatically and updated only after 30 minutes, no matter how many times the command is executed. This is a nice balance between API usage and keeping the values current.
cargo install --git https://github.com/coder543/cryptoticker
cryptoticker --help provides a useful summary of the options that are supported.
In your ~/.tmux.conf file, you can add this to your statusbar to track ethereum and bitcoin prices: #[fg=white,bg=default,bright]#(cryptoticker ethereum bitcoin)
If you're using something other than tmux, it might be useful to run the command in a continuous, interval mode, where the command stays alive and refreshes at a set interval. To use this mode, simply do cryptoticker -i ethereum bitcoin, which will use a default timeout of 5 minutes, or cryptoticker -i -t SECS ethereum bitcoin to set the timeout interval manually.
cryptoticker --clear-cache will completely remove the cache directory. Useful if uninstalling or if you want to force the one-shot mode to refresh.
cryptoticker uses api.coinmarketcap.com, which only updates once every 5 minutes, so refreshing any faster than that is just poor etiquette. ethereum and bitcoin are provided as examples, but cryptoticker supports all currencies that coinmarketcap supports on the API.