Alr y'all found the trick (non-American stream wow /j) but do you know how much money you'd get at the end of the month if you didn't touched that one dollar?
0.5³⁰ is the answer, assuming that the month is 31 days long. Which gives us the incredible amount of 9.313e-10 dollars.
Which yeah, you can't do much with that....
BUT, if you overspend that one dollar, does the debt multiply by 0.5 each month ? Cause if yes, you could get yourself in a billion dollar of debt the first day and would have less than a dollar to pay at the end of the month.
Lesson earned: don't multiply money.