if major usdc holders who have a circle account were primarily concerned with tiny arbitrage plays they wouldn’t be holding a stablecoin earning zero yield when t-bills pay 5% to begin with
This isn't a tiny arbitrage play because you can repeatedly do it for as long as circle is liquid. Even if you don't hold a lot of USDC it's selling at a discount on the open market. If it goes into a full bankrun all circle accounts will be fighting over what share of the $43.5 billion reserves that they will get.