Let's discuss a hypothetical.
Let's say there was a system that allowed you to gain a $1 bill for every .0043″ [.10922mm] (the thickness of a single dollar bill) you moved, whether by running or walking. The only stipulation being that you must physically carry or drag the full weight of your earnings (each bill weighing approximately 1g [.03527oz]).
If you ran as fast as you could, you would not make, nor could you carry, as much as Jeff Bezos. Lets say his net worth is 75,000,000,000.
Approximating his hourly income at 8.56m per hour, you would have to run, within one hour, 36,808 inches [3,067 ft or 934m] (that's nearly a kilometer and well over half a mile). Now, half a mile per HOUR doesn't seem terrible, until you factor in:
Every minute, you would be carrying an extra 314.5 pounds, and you would have to move at a constant rate of 613 inches [15.5 meters or 51 feet] per minute [10″ or 26cm per second]
A decently slow human walking pace is 2.5 miles per hour, or 44 inches per second; At this rate, you would accrue $10,232 per second. 10.232kg [22.5lb] every second. Every five seconds of walking, you would have to carry an additional 112.8 pounds [51kg].
Every foot you walked you'll add an additional $2,790, or the equivalent to 6.15lb. There are 5280 feet in a mile. At one mile in length, you'ld have $1 227,907. That would weigh 1,227.9kg or 2,707 lb of dollar bills.
In order to match his 75bn net worth, you would have to haul 322,500 inches [5.08 miles or 8.2km of stacked bills]. 75bn in dollar bills would weigh 165,346,696 pounds. That's over 165 million pounds.
That's insane.
I'm sure my math is all sorts of off, and there is probably many mistakes, but I'm tired and didn't give it much effort tonight. Maybe I'll edit it tomorrow.