How Crypto Works (In Simple Language)
Wallets, Private Keys, and Sending Crypto – Explained with Mobile Money Logic
By: Armar Josh
06/18/2025
First, Think About Mobile Money
If you’ve ever used M-PESA, MTN/Airtel Money, Orange Money, or even done an airtime transfer, then you already understand the basics of how crypto works.
- You have a mobile wallet on your phone.
- It has a balance.
- You can send money to someone else using their phone number.
- To confirm the transfer, you enter your PIN code.
Right?
Crypto Works the Same Way — But Without a Company Behind It
In the crypto world, there’s no MTN or Safaricom. You’re in full control of your money.
Let’s break it down:
1. What is a Crypto Wallet?
A crypto wallet is a digital place where you store and manage your cryptocurrency.
Just like:
- A mobile money account holds your UGX or KES
- A crypto wallet holds your Bitcoin, Ethereum, or USDT
There are two main types:
- Hot Wallet – connected to the internet (like an app: Trust Wallet, MetaMask)
- Cold Wallet – offline (like a USB drive you keep at home)
But here’s the key thing:
👉 Your wallet doesn’t “hold” your money — it holds the keys to access it on the blockchain.
2. What is a Private Key (or Seed Phrase)?
Think of your private key as your mobile money PIN or SIM card secret.
It’s the secret code that gives you access to your wallet and your crypto.
- It looks like a long jumble of letters and numbers (e.g., 5Jx23GkL8g...)
- Or a 12- or 24-word recovery phrase like:
- butter lemon goat radio jungle travel mirror...
🛑 Very important:
- If someone gets your private key, they can take all your crypto.
- If you lose your private key, you lose access forever. No call center. No reset.
So store it offline, in a safe place, just like you’d hide a backup PIN or national ID.
3. How Do Transactions Work?
Let’s say you want to send your friend 10 USDT.
Here’s what happens:
Step | Mobile Money | Crypto |
1 | Enter recipient’s number | Enter recipient’s wallet address |
2 | Enter amount | Enter amount in BTC/ETH/USDT |
3 | Confirm with PIN | Confirm with your private key |
4 | Network processes payment | Blockchain processes transaction |
5 | Receiver gets funds | Receiver gets crypto |
- In mobile money, your telecom updates its server.
- In crypto, the blockchain updates the public ledger.
The difference? No middleman. No delay (except network fees). No bank hours. It works 24/7.
What Does a Wallet Address Look Like?
It’s like your crypto phone number.
- BTC Address: bc1qxy2kgdygjrsqtzq2n0yrf2493p83kkfjhx0wlh
- ETH Address: 0x32Be343B94f860124dC4fEe278FDCBD38C102D88
Each coin has its own type of address. Just like you can’t send Airtel Money to an MTN number, you can’t send Bitcoin to an Ethereum address.
Crypto Tips for Beginners:
✅ Always double-check wallet addresses.
✅ Save your seed phrase offline — never in your email or on WhatsApp.
✅ Use trusted apps (like Trust Wallet, MetaMask, or Coinbase Wallet).
✅ Try test amounts first before big transfers.
✅ Learn before you earn — education protects you.
BONUS: What Can You Do with a Wallet?
- Receive payments from anywhere in the world.
- Send money instantly, even across borders.
- Store savings safely, away from inflation.
- Access Web3 apps (we’ll explain this in the next article!)
In Summary
A crypto wallet is like your mobile money app.
Your private key is your PIN.
Your wallet address is like your phone number.
And the blockchain is the global system that keeps track of everything.
You don’t need to be a tech guru to use crypto, just like you didn’t need to be an engineer to use M-PESA.