Billionaire Larry Fink Warns Keeping Your Savings in a Bank Account Is 'One Of The Worst Financial Decisions Of A Lifetime' — But Mark Cuban Told People To Do the Opposite

Larry Fink, who runs the largest asset manager on earth, has a one-line verdict on where most households keep their money. "Instead of having your liability, which is your liability of life, your duration of your existence, having your money in a bank account is one of the worst financial decisions of a lifetime," the BlackRock (BLK) chief executive said.

Fink made the remark in a conversation with Brookfield Corporation (BAM) (BN) CEO Bruce Flatt on day two of the Milken Institute Global Conference in May 2026, in a session moderated by Michael Milken himself. The Milken Institute has since published the full transcript, which is where the quote comes from.

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The context matters, because Fink was not talking about emergency funds or the couple of months of expenses most planners tell people to hold in cash. He was making a structural argument about the length of a human life. A person's biggest financial liability, in his framing, is the number of years they have to fund. Cash in a checking account does not compound against a multi-decade obligation, and that mismatch (not the interest rate in any given year) is what he was calling a mistake.

He tied it to a claim about who has been winning for the past generation. "And what we've seen over the last 30 years, wages have not kept up with the role of capital," Fink said. He then extended the point forward into the AI build-out: "We are not going to be able to broaden economic success only by wages, because wages in this AI world are not going to grow as fast as the potential of the AI growth." It is a striking thing to hear from the person whose firm sits on the capital side of that divide, and it is essentially an argument that a paycheck alone is no longer a route to getting ahead.

Fink's advice cuts directly against a piece of guidance from another billionaire that Barchart has covered before. Mark Cuban has told people sitting on six figures that the best guaranteed return available to them is buying household staples in bulk, and that the remainder belongs in the bank, where he was content to let it earn nothing. Two men with nine- and ten-figure fortunes, looking at the same savings account, reaching opposite conclusions.

The disagreement is real, but it is smaller than it looks and worth stating fairly. Cuban's case is about certainty and control: a guaranteed saving on something you will definitely buy and dry powder that cannot fall in value. Fink's case is about duration: over forty years, an asset that does not grow loses to one that does, and the gap compounds. Cuban is answering "what is safe." Fink is answering "what funds a life." A reader can hold both.