There is no relationship between Bitcoin and the value of the financial sector, economic output or worldwide debt. You can compare the value of Bitcoin to the value of anything, but that doesn't mean that they will some day be equal.
The most appropriate comparison is to something that Bitcoin can replace, such as base money, which is about $19 trillion. Only then can you get a realistic target.
Hmm. I would beg to differ on this thanks mostly in part to a very famous post by the late Mr Hal Finney,
From the quote below it seems that it may have been a possibility that things like debt, wealth and other factors were indeed looked at at some time.
While the debt clock continues tick closer to the western financial disaster on the horizon it seems the captain of the ship's heading for the rocks are doing what they always do... Nothing.
No warning calls just debt based financial ruin lay's ahead.
As an amusing thought experiment, imagine that Bitcoin is successful and
becomes the dominant payment system in use throughout the world. Then the
total value of the currency should be equal to the total value of all
the wealth in the world. Current estimates of total worldwide household
wealth that I have found range from $100 trillion to $300 trillion. With
20 million coins, that gives each coin a value of about $10 million.
So the possibility of generating coins today with a few cents of compute
time may be quite a good bet, with a payoff of something like 100 million
to 1! Even if the odds of Bitcoin succeeding to this degree are slim,
are they really 100 million to one against? Something to think about...
Hal