How many US dollars are in the bank of a standard US Monopoly set (2008 and later editions)?

Answer

20,580 US dollars

The total was $15,140 for decades until Hasbro bumped it to $20,580 in 2008. The bank can never truly go broke anyway — under the classic Parker Brothers rules, the banker simply issues new money written on ordinary paper.

Source: Hasbro / Wikipedia (Monopoly)