New to Coins? Blockchain, Wallets and Mining in 5 Minutes
All the hard words are explained in the word list. If you get stuck while reading, look them up there.
What is a blockchain?
Think of the record book for a neighborhood savings club (a group that puts money into a shared pot each month). Usually one treasurer keeps the book. If the treasurer secretly changed it, nobody might notice.
A blockchain is a way for every member to keep an identical copy of that book. If someone changes only their own copy, it won't match everyone else's, and they get caught right away. So no one person can change it in secret.
What is a coin?
It's money written in that record book. The record that says "this many for this person" is the coin. There's nothing to hold in your hand, like a bill.
The coin on SASEUL is called SL. It was made by ArtiFriends, a Korean company. There's more on the SASEUL basic facts page.
What is a wallet?
It's an app for receiving and sending coins. Here's how it compares to a bank account.
| Wallet word | Bank account version | OK to share with others? |
|---|---|---|
| Wallet address | Account number | Yes, that's fine |
| Private key | PIN and signature | Never |
If a person or a program asks for your private key, treat it as a scam. Even a mining program only needs your wallet address.
What is the official wallet app?
SASEUL's official wallet app is Guardee, made by ArtiFriends. If a different wallet shows up after you restore it, see the Guardee wallet restore post.
What is mining?
To add a new page to the record book, someone has to solve a hard puzzle. Whoever solves it first gets coins. That's mining.
The puzzle isn't solved by thinking. It's solved by guessing over and over. It's like scratch cards: the more you scratch, the better your odds of a win. So a faster computer has the edge, and it uses more electricity.
Can you mine with a home computer?
It depends on the coin. Bitcoin is mined with special mining machines. Ethereum stopped mining in 2022.
SASEUL can be mined with just one NVIDIA graphics card in a home computer. Instead of mining alone, you join a mining pool (a group that mines together and splits the coins). There's more in the post on coins you can mine at home.
Where can I buy or sell it?
As of September 27, 2026, there's no officially confirmed exchange listing. The only confirmed listing was BitMart, an overseas exchange, and it stopped all trading on August 26, 2026. Details are in the BitMart closure post.
What should I read first?
Reading in this order is the easiest.
- Are there still coins you can mine at home?
- What is hashrate (calculating speed)?
- What is a mining pool?
- How much does the electricity cost?
- If you feel like trying it, how to set it up and the mining guide
Is there anything to watch out for?
Yes. Just remember three things.
- Never give your private key to anyone
- Download mining programs from the pool sites whose addresses appear in official notice #84 (September 2026), and compare the file fingerprint (SHA-256) listed on the site. The notice itself says the three pools it lists have no tie to the official team
- Don't believe anyone who says "put your coins in and we'll grow them"
If you see something odd, please report it through the tip form.