Okay let's take the second route. Where the price of dollar drops to the point that a fifty thousand present day dollar bitcoin is actually one million dollar bitcoin. It's not an entirely impossible scenario.
I think people are inherently intelligent. In the coming decade they are going to realize that value is equal to money and dollar is not equal to money. Considering this the value of Bitcoin, even if it is 10 million a piece will be bought and sold by the people who understand that value is in what we choose not what's dictated.
I know it's far fetched but again the reasoning is not entirely improbable.