₿ Crypto & Web3 · Lesson 8 of 9 · 5 min
Why It Costs Money to Move Your Money
⛽ Imagine paying a toll every time you sent a text — and the toll spiked when the road got busy. That's a crypto 'gas fee,' and it's why sending $5 of Ethereum once cost people $50.
💡 Key idea
Gas fees pay the network to move your crypto — not the person you're sending to. Busy network = higher toll.
🧠 Why it matters
A GAS FEE is what you pay the network to process your transaction. It doesn't go to whoever you're paying — it goes to the computers (validators) that confirm and secure it. Fees rise when the network is congested and fall when it's quiet. Networks vary wildly: Ethereum's main chain can be pricey, while 'layer-2' networks and chains like Solana are usually pennies.
🌍 In the real world
🚦 Practical reality: sending at a quiet hour can cost a few cents; during a frenzy it can cost more than what you're sending. Wallets show the estimated fee before you confirm — check it. For small amounts, a cheaper network (a layer-2 or low-fee chain) can be the difference between a 1-cent fee and a $20 one.
📌 Takeaways
- Gas = the network's fee to process your transaction
- Fees rise with congestion, fall when quiet
- Cheaper networks (L2s) can cut fees from dollars to cents
📖 Terms in this lesson
Gas fee: The fee you pay the network to process a crypto transaction.
✅ Test yourself
Who actually receives the gas fee you pay?
- The person you're sending to
- The network/validators that process it
- The government
- Your bank
Answer: B · The network/validators that process it
Gas pays the computers that confirm and secure your transaction — not the recipient.
Why do gas fees sometimes spike?
- Crypto's price went up
- The network is congested with transactions
- It's the weekend
- You sent too little
Answer: B · The network is congested with transactions
When everyone transacts at once, fees get bid up to be processed first — congestion drives the toll up.
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