International monetary system and "war" to "capture" global savings

The international monetary system is currently based on the dominant role of the dollar as international reserve currency (there are "secondary" reserve currencies: euro, pound sterling, yen). Having the reserve currency makes it possible to " capture " global savings: we see that all regions are now lending their savings to the United States, even though it has the highest per capita income. This gives a considerable advantage to the United States, which can finance its external and fiscal deficits at very low interest rates. It would then be logical that other countries (China, the euro zone) try to have a large reserve currency. This requires them to have a sufficient amount of safe financial assets to provide to investors from the rest of the world. They will perhaps be helped in this undertaking by the "Triffin paradox": the United States uses the dollar's reserve currency role excessively, ending up losing this role due to the excessive debt that it is running up.