This wouldn't surprise me at all.
Walt has shown no real desire to
really handle the money he's made. There is no long term laundering plan that would be passed down generationally. He hasn't tried to funnel the money in a foreign account or invest it elsewhere other than the car wash. Burying the money did nothing for Walt Jr. or Holly. What are they supposed to do roll up in a van and dig it out themselves if their parents die?
It's $80 million in dirty drug money. Where they gonna spend it?
He knows he is on borrowed time...whether it be cancer, the DEA, or one of many people that are/will be gunning for him. His wife is tied to his fate. But his ego is big enough to think that he will be the only one that suffers from his actions.
It took Skyler dragging his ass into the storage unit to get him to realize what he had accomplished already.
Jesse making it known he is the real Heisenberg would kill him.
Funny thing is, in the flash forward when he walks back in the house and sees that name spray painted across his living room wall all he can feel is remorse.