I don't agree with the website, but I think I know where they are coming from.
The year 1971 was when the US dollar was made to float, instead of being backed by gold. [1]
I think that the website wants to have our monetary system change back to being backed by something that is a limited resource, and I bet Bitcoin fits the bill in their mind.
[1]: https://en.wikipedia.org/wiki/Gold_standard#In_the_United_St...
Edit: punctuation.
