Optimism
Optimism runs the same rollup design as Arbitrum. It carries the same three assets too: USDT, USDC and ETH. For someone moving money the honest summary is that the choice between them is usually made by where the funds already are, not by any property of the chain — which is exactly why this wallet quotes both and lets the route decide.
When the chain choice does not matter
A lot of writing about rollups compares proof systems and sequencer design. None of it changes what a transfer costs you or how long it takes at this size. If your USDC is on Optimism, send from Optimism; the wallet will not charge you extra for having landed on one rollup rather than another.
Gas in ETH, paid from the token
Optimism prices gas in ETH. That fee is settled inside the operation, so an account holding only USDC can still send — which on an ordinary wallet it cannot.
The OP token is not here
Optimism’s governance token is deliberately not offered. This wallet carries assets people move as money, not tokens people hold to vote with, and the shorter list is what keeps every picker readable.
Related
Questions
Do I need ETH on Optimism?
No. The ETH-denominated gas is paid out of the operation.
Should I use Optimism or Arbitrum?
Whichever already holds your funds. At the sizes this wallet handles the two are equivalent, and moving between them just to pick one costs more than it saves.
Can I hold the OP token here?
No. The wallet lists assets that are moved as money; governance tokens are not part of that list.