Marty thinks differently. There is no replacement for the dollar. Not right now anyway. Maybe in the 2030's. So, yes I agree the dollar will die. Soon? Depends on your definition of soon. In the next 10 years, probably.
I bought a new f 150 in 1987 for 12k. Not sure what they go for today but his argument was that when you factor in all the new tech things are actually cheaper. In 1990 a computer was about 400 bucks. Today I can go to war mart and get one for 3-400 bucks but with way more computing power.
There has been lots of smart people over the years that have been declaring the dollar is dead. In 1990 it was the end of the world once we crossed the 1 trillion dollar mark in the national debt. He we are 30 trillion plus later and still going strong. Of course it's all an illusion of wealth. Take away 32 trillion in debt and everything goes back to 1970's prices.
As I said, they both make a good argument. I'm not smart enough to figure out when this all ends. I live on a cash basis. Everything is paid for and 0 debt. If we get inflation I am ok. If everything crashes I still have a roof over my head. Get out of the system and you won't care about the system.