Q: Is Ethereum mainnet still worth using?

Yes, for large transfers (>$1000) or when sending to exchanges that only support mainnet. The higher security and universal compatibility often justify the $5-15 fee for significant amounts.

Question 1

What is the cheapest way to send ETH?

Accepted Answer

For small amounts, L2 networks like Base or Arbitrum offer the lowest fees ($0.30-0.50). However, consider the one-time bridge cost if you need to move funds from Ethereum mainnet. For very small amounts (<$50), Polygon is often cheapest.

Question 2

Is Ethereum mainnet still worth using?

Accepted Answer

Yes, for large transfers (>$1000) or when sending to exchanges that only support mainnet. The higher security and universal compatibility often justify the $5-15 fee for significant amounts.

Question 3

What is the difference between L2 and sidechains?

Accepted Answer

L2s (Arbitrum, Optimism, Base, zkSync) inherit Ethereum security and post data to mainnet. Sidechains like Polygon have their own validator sets and security models. L2s are generally more secure but may have higher fees.

Question 4

How long does it take to withdraw from L2 to Ethereum?

Accepted Answer

Standard withdrawal takes 7 days for optimistic rollups (Arbitrum, Optimism, Base). zkSync offers ~24 hour withdrawals. You can use fast bridges or centralized exchanges for instant exits (with fees).

Question 5

Can I send ETH from L2 directly to an exchange?

Accepted Answer

Only if the exchange explicitly supports that L2 network. Most major exchanges now support Arbitrum and Optimism, but always verify before sending. Sending to unsupported networks may result in permanent loss.

Question 6

What is "finality" and why does it matter?

Accepted Answer

Finality means a transaction cannot be reversed. On Ethereum, it takes ~15 minutes. L2s offer instant soft finality but 7-day hard finality. For most transfers, confirmation is sufficient; finality matters most for very large settlements.

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Lỗi thường gặp cần tránh

Choosing L2 for exchange deposits

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