Gazza M Unpredictable and untrustable behaviour along with brinkmanship will do huge damage to all international relationships to which the United States isn't entirely indispensable.
People aren't gonna look at Trump ordering the US out of the WHO and think "Oh wow, there's a great country that we definitely want to structure our multilateral diplomacy around". In short, this kinda nonsense seems guaranteed to hasten the rise of a multipolar world in which China-centric arrangements are frequently preferable to US-centric ones.
I'd be surprised if there weren't a few more serious candidates for de-dollarisation before 2028.