Why US’s Biggest Internal Problem is Dollar？

Why is de-dollarization happening? Why is the dollar system, widely assumed to be unbeatable, crumbling? Distilling decades of work on the dollar system, including her book, Geopolitical Economy: After US Hegemony, Globalization and Empire, also available in Chinese translation as 地缘政治经济学(在美国霸权全球化和帝国之后)/国外马克思主义和社会主义研究丛书, In Russian translation as Геополитическая экономия: после американской гегемонии, глобализации и империи  and in German Translation as Geopolitische Ökonomie: Die Nachfolgerin von US-amerikanischer Hegemonie, Globalisierung und Imperialismus, and its predecessor, the sterling system, Professor Radhika Desai shows that the de-dollarization rests on two pillars, its external problems and its internal contradictions.
https://www.plutobooks.com/9781849648400/geopolitical-economy/
https://www.amazon.com/-/es/%E5%8A%A0-%E6%8B%89%E8%BF%AA%E5%8D%A1%C2%B7%E5%BE%B7%E8%B5%9B/dp/7229165792
https://mangroven-verlag.de/publikation/geopolitische-oekonomie/