To dive headfirst into a pool of gold coins, literally swimming through your wealth, an activity popularized by its namesake. Because when you're as rich as he is, there's literally nothing better you can do with your money. Can apply to representations of wealth aside from gold coins, such as silver coins, dollar bills, etc.
Axl Rose: "Wow man, awesome!! why?"
Slash: "cos i wanna be like Scrooge McDuck and Marc Bolan!"