Arbitrum
Arbitrum is Ethereum’s busiest rollup. Transactions execute here and settle back to Ethereum, so you get Ethereum’s security at a small fraction of its fee. It carries USDT, USDC and ETH — the full stablecoin pair, which is what separates it from Base.
Cheap, but still ETH
Gas on Arbitrum is denominated in ETH, not in a token of its own. A wallet holding only USDC on Arbitrum is therefore just as stuck as one holding only USDC on Ethereum — less expensively stuck, but stuck. The fee here is paid out of the operation, so the question does not arise.
The USDT that is not quite USDT
Arbitrum’s USDT is the LayerZero version, which trades under the ticker USDT0. It is the same dollar and the wallet shows it as plain USDT, because a second name for the same asset is how a balance ends up priced at zero on one screen and correctly on another.
Withdrawing to Ethereum
Moving from Arbitrum back to Ethereum through the chain’s own bridge involves a challenge period measured in days. That is not the route this wallet takes, and the estimate you are quoted is the one that applies.
Related
Questions
Do I need ETH on Arbitrum to send?
No. Gas is paid inside the operation, in the token you are sending.
Why does my Arbitrum USDT show as USDT0 elsewhere?
Arbitrum carries the LayerZero USDT0. It is the same dollar, and the wallet deliberately shows one name for it so prices and balances agree everywhere.
Does leaving Arbitrum take a week?
Not here. The multi-day wait belongs to the chain’s own withdrawal bridge; the wallet quotes the time for the route it actually uses.