This is just a logical step of change. People hate change and thendollar has been around for so long they cannot believe it would ever be replaced. Just like most people living today have never witnessed actual war and think the world will not see a war again like WW2.

This makes people naive, careless and malleable.

The narrative is strong and a big majority. The dollar is to currencies what the Kim regime is to North Korea. They get to spread the most believable propaganda and can have their victims believe in it so strongly that they are willing to defend it against their own liberation.