First of all, this screenshot seems to have been taken on year 2020 since it says that 2012 was 8 years ago in which they are saying at that time if you hadn't bought bitcoin then you have missed bitcoin already.
Now, imagine being begged to purchase what will create you fortunes, same happened 2011 and what do we think about those failing to have a take on Bitcoin currently? It does look like a great deal because exactly 8 years from now, the price of Bitcoin will look very different just as it is as of today compared to 2011.
Back then it is understandable that some people were not as confident of bitcoin. They were anxious and not trusting of bitcoin but now there is little reasons for people to not trust bitcoin after seeing what it has done for other people.
Clearly, it is false that we can get 1 Bitcoin worth a Dollar no matter how the DIP happens.
I do not think they are saying 1 bitcoin will be worth a dollar. But they are saying that you can buy bitcoin with a dollar only. Though today that will mean really small unit of bitcoin compared to back then.