Walter White has lots of money.
No doubt it was just a throwaway comment.
NOT BUYING IT, GILLIGAN.

Credit: Ben Leuner/AMC; Disney
Lets run down the similarities, shall we?
Scrooge McDuck, meanwhile, keeps his money stored inside of a large Money Bin.
Scrooge McDuckalsohas a pile of money which he keeps in his Money Bin that is essentially uncountable.
This is a goal matched by Walter White, whose mission statement is to be in the Empire Business.
Both Walter White and Scrooge McDuck have a nemesis who is their mirror image.Flintheart Glomgold, meet Gustavo Fring.
Walt has the possibly-even-more-terrifying ability to absorbthe habits of his victims.
(In this metaphor, Hank is Magica De Spell.)
In their first appearance, neitherWalternor Scrooge was wearing anypants.At least Walt was wearing underwear.
They both have excellent theme songs.Sure, we all knowtheDuckTalestheme.
But who can forgetThe Ballad of Heisenberg?
In its penultimate chapter,Scrooge turns his back on his family.
So, a Theory:Walter White willnotdie at the end ofBreaking Bad.
Either that, or at some point in this season Walter White will actually drown someone with his money.
In conclusion,that Saul Goodman spinoffwill be about Saul moving to Saint Canard and becoming Darkwing Ducks sidekick.