I don't believe Circle/Centre has the ability to burn tokens on your behalf. Realistically if a chain (eg. SOL) was going down the tube, you'd probably want to

I don't believe Circle/Centre has the ability to burn tokens on your behalf. Realistically if a chain (eg. SOL) was going down the tube, you'd probably want to hit fiat off-ramps (eg. deposit to Binance) or bridge out of SOL and pay the appropriate gas fees. That is to say, if Binance halted deposits from SOL for a long amount of time, you'd have the option of bridging from SOL to ETH and then cashing out your USDC from ETH. It would just cost you more in fees to do so.