It all depends upon continued demand for USTs and anyone who understands the US economy is now trading at a loss for decades and cannot continue as it has done without becoming insolvent will see the problem here. Tether might prop up the USD but the USD is nevertheless facing an existential challenge as China is now the dominant global productive economy and China has built mBridge to be an alternative to the USD SWIFT protocol which has been the basis of US global financial system 'petrodollar' hegemony. Tether goes down with the USD. No wonder some are seeking to buy into Bitcoin before the USD sinks into insolvency.