sure, but as an outsider looking in - the thing that erodes my faith in the currency is not the minting of a trillion dollar coin, it's the complete disfunction of governance that leads to a situation where this is even considered.

And the harm is already done on that front.

This is relatively low impact compared to other shenanigans.

A debt default or a sudden halt of US government spending, both resulting in economic collapse, would both be much more effective at eroding faith in the value of the US dollar.