The US world reserve currency status only happens by norm. When RU invaded UA the US cut off RU from most of their access to USD / US-allied banking. At that point, CN and the BRICS countries started working on a decentralized version of a "world reserve currency" which is partially implemented.

Investors know the US is going to lose this status if the current momentum continues and there are some possible alternatives.

Investors won't sit by and tolerate MONEY PRINTER GO BRRRRR if they have ANY alternatives and they have LOTS of incentives to find any.