I think we are headed towards blockchain and crypto based coins inevitably. As globalism continues to rise, we have no other choice but to adapt a single currency monitored and regulated by everyone and none would have supreme authority over it.

The US dollar is a messed up thing. With too much risks, I would never store fiat cash under my bed because it's just too risky and will lose value. In India we had demonetization where 500 and 1000 rs notes were banned which showed me how fiat is useless concept!