I just saw someone ask in the group: can Layer 2 really be used as a mainnet, and for daily interactions which side is cheaper.

It’s an interesting question. My own habit is that **small transfers, interactions, and even farming air drops basically all go on Arbitrum or Optimism**—in any case, gas fees are negligible, and the experience is fine. But if you’re really talking about spot trading, going in with large amounts, or doing some complex smart contracts, then I’ll still fall back to the mainnet, even if it’s more expensive.

To put it plainly, it’s not a technical problem—it’s a psychological one. The mainnet’s depth is right there; you know your slippage in your head, and limit orders fill reliably. Layer 2 has a great view from the window, but if you really try to jump from the second floor, your legs still feel a bit weak.

Especially lately, the concepts of AI agents and automated trading have been hyped up quite mysteriously—things like “one-click on-chain arbitrage” and “smart trading robots,” which sound really cool. But when it actually comes time to act, if you haven’t even figured out the counterparty contract’s owner permissions and how much the fee skimmed, how can you dare to throw large amounts of assets in?

The real question is: are those robots actually reliable? …At the end of the day, you still need to keep an eye on it yourself.

Anyway, I’ve learned the hard way recently: **small funds for the L2 experience; mainnet only for core operations**. First learn how to break one transaction into several steps, and then think about how to save those few bucks in gas.