Dear @lestatisticien ! thanks for your message. By dollar collapse, I mean the end of of the tool which makes possible the US global hegemony and the US Empire, which is just one more empire along history that will fall the same way the greeks, romans, spanish or british did in the past....
Of course, any fiat currency loses its purchase power year by year due to inflation...and you can not compare the dollar from 1913 with today's dollar at all. When I mean "dollar collapse" I am refering to a real hyperinflation in a short period of time where most of the international creditors of the US lose the trust in the US Treasury and its capacity to pay back its debt and no longer accept it as a medium of exchange or a deposit of value.
Actually, 1971 is what made the whole situation worse and what ended up converting the dollar in the reference currency for today's global trade allowing the US to print as much money as they please to get into debt at expenses of other countries.
We've got to learn from history as it always repeats itself (even though when we are so arrogant to think that we are better and smarter than older generations). Please, look what France's president Charles de Gaulle said about the dollar back in 1965 to understand how old this issue is...
I'd also highly recommend you to watch Mike Maloney's "The hidden secrets of money" dedicated to this very matter. This video is quite informative and might make you understand all more in-depth.
hope my answer was good enough for you to understand what I mean by "dollar collapse". If not, I am open to discussion.