Or, the House of Saud will fall. When they had the petrodollar deal with the US our military supremacy gave them absolute protection, which bolstered their autocratic rule.

But now we're transitioning into a multi-polar world with a new reserve currency (digital SDR) made up of a basket of currencies.

They could fail from their own mistakes, they don't have the backstop they did for the past 50 years and they've made a lot of enemies along the way (Iran, Qatar, etc)