The Money Bin is a large building that houses a large sum of Scrooge McDuck's fortune. In DuckTales, it is separate from his home, and is down the street from his mansion; in the DuckTales reboot it is located on a small island just off shore from Duckburg.
It's frequently the target of numerous thieves, particularly The Beagle Boys. Scrooge has installed a security system, where an alarm is triggered in his mansion when someone breaks in.
In this series, the Money Bin is located on a small island in Audubon Bay, just off the shore from Duckburg. It's connected to the mainland with a bridge. The building, beside the main room filled with gold, also contains a number of other rooms, including Scrooge McDuck's office on the top floor, where he negotiates business with his Board of Directors; a hall where the (decoy) Number One Dime is exhibited; a library where Emily Quackfaster works; and Gyro Gearloose's underwater laboratory.
In "The Great Dime Chase!", the Board of Directors suggest that Scrooge should sell his Money Bin and move his headquarters to an office in Duckburg to save some money, but Scrooge scoffs just at the mere idea of it.
The Bin is partly destroyed in "Jaw$!" when Tiffany the Money Shark breaks its wall; and again in "The Shadow War!", when Magica De Spell turns it into her throne room. Scrooge, presumably, rebuilt the Bin's walls after these events.
- A 60's Disney short, Scrooge McDuck and Money, points out that it's financially unsound to keep his millions isolated. It's explained then that it only contains a portion of his money, and the rest continues to circulate. In the 1987 DuckTales, however, Scrooge seems to keep all of his money there, as evident by him being 'broke' whenever he loses the money inside. In the 2017 series, it is implied again that he keeps some of his money in stocks and businesses