It's not static, global wealth been growing at 3.8% per year for the past 25 years, which is historically quite a high rate. 10 more years at that rate would be 50% growth, or $750T.

The numbers you're talking about aren't feasible. MSFT grew that fast into the Desktop era because it was starting from a much smaller number. You can grow from $400m to $40b, but you growing from $40b to $4T is a much different story (and remarkable that they were able to do that!). Growing from $4T to $100T is not only unprecedented but unimaginable.

So you might be making a calculation instead of a prediction, but it's a worthless calculation. You may as well extrapolate the 10x weight gain of an infant to an adult and calculate that their weight at middle-age will be 1000 pounds.