<Currency> means 3-letter currency codes listed here. Exchange rates are listed there too.
No. Discoin only exists during the transaction process and statistics: As a universal unit for calculating currency, it is only used for calculating exchange rates as well as currency reserves. The real world equivalent example would be XDR.
Check the Transaction Record. If it says the transaction isn't handled, the receiving bot hasn't processed it yet - By standard, bots should pick up its transactions on a 5-minute interval - so just wait patiently.
If it has been more than 5 minutes and the transaction still isn't handled, contact the developer(s) of the receiving bot.
Here's a table on the earning and spending mechanisms of each bot.
Bot (Currency Code)
How to Earn (Except voting and daily)
How to Spend
Renewing your DiscordTel service,
DueUtil 3.0 (DUC)
Elite Looter (ELT)
Murder Mystery Bot (MMB)
Chat rewards, as well as coin drops if enabled
Theelgirl's DueUtil (DUT)
The concept, math, and non-technical documentation of Discoin is developed by Austin Huang (DiscordTel).
Discoin is open source. If you cannot contribute financially, consider contributing your time reviewing the code!
And of course, you can easily support Discoin by spreading the word to the world! Convince the developers of your favourite bot(s) to implement Discoin by showing this guide to them.