That’s because the dollar was their life boat. They don’t use the Bolivar anymore, they use USD. They’re also not a competitive world power with other world powers hungry to tear them down. 

Dude - there’s no one that thinks the US could survive in its current state if we hyper inflate. Why do you think interest rates are so high right now? Why do you think they’re taking drastic counteractive measures? 

or to Nicolas Maduro - hyperinflation since 10 years, still in office.