Exploring the bash prompt

PS1

#!/bin/bash

# GNU bash, version 5.0.3(1)-release (x86_64-pc-linux-gnu)

# Some of these are a little tongue-in-cheek as an unresponsive prompt would be
# an annoying distraction. But still. This file should be sourcable to ensure
# individual commands can be pasted straight into the terminal.

# Uptime
PS1='$(
uptime | cut -d, -f1
) \u@\h:\w $ '

# Current IP address(es)
PS1='$(
hostname -I
) \u@\h:\w $ '

# Epoch seconds (bash 5)
PS1='$EPOCHSECONDS \u@\h:\w $ '

# SSID of current WiFi connection
PS1='$(
iwconfig |& grep -o "\".*\""
) \u@\h:\w $ '

# Bitcoin spot price
PS1='$(
curl --silent "https://min-api.cryptocompare.com/data/price?fsym=BTC&tsyms=USD" | grep -o "[0-9\.]*"
) \u@\h:\w $ '

# GBP-EUR exchange rate
PS1='$(
curl --silent "https://min-api.cryptocompare.com/data/price?fsym=GBP&tsyms=EUR" | grep -o "[0-9\.]*"
) \u@\h:\w $ '

# Value of your Ethereum wallet
PS1='$(
curl --silent gbp.rate.sx/0.01113750ETH
) \u@\h:\w $ '

# Time from NIST - two versions: using netcat and /dev/tcp
PS1='$(
nc time.nist.gov 13 | cut -d" " -f3
) \u@\h:\w $ '

PS1='$(
cat </dev/tcp/time.nist.gov/13 | cut -d" " -f3
) \u@\h:\w $ '

# Public IP address
PS1='$(
curl --silent ifconfig.co
) \u@\h:\w $ '

# Country associated with current IP address
PS1='$(
curl --silent ifconfig.co/country
) \u@\h:\w $ '

# Examples to add
#   Animations
#   CPU load
#   Google cloud status
#   Network stats
#   Display duration of previous command - see https://github.com/rcaloras/bash-preexec/issues/28
#   Right-aligned text - printf "%${COLUMNS}s\n" "hello" - https://superuser.com/questions/187455/right-align-part-of-prompt
#   Trimming the prompt - https://zork.net//~st/jottings/How_to_limit_the_length_of_your_bash_prompt.html
#   Rotating through different info each return
#   Spot price diff exceeds standard deviation
#   Do slow calculations as a background process
#   Terminal Title Ticker

# References
#   http://bashrcgenerator.com/
#   http://www.tldp.org/HOWTO/Bash-Prompt-HOWTO/x405.html
#   https://www.gnu.org/savannah-checkouts/gnu/bash/manual/bash.html
#   http://tiswww.case.edu/php/chet/bash/NEWS
#   https://www.cyberciti.biz/tips/howto-linux-unix-bash-shell-setup-prompt.html