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Warren Buffett Says These 5 Investments Could Ruin Your Retirement

Five common investing choices that clash with Buffett's playbook.

By Adam Palasciano , Edited by Laura Hohenstein

Updated Oct. 8, 2026

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Warren Buffett built his fortune by owning productive businesses for long stretches of time, not by chasing whatever investment happens to be popular. That philosophy has also led him to warn repeatedly about strategies that can expose investors to unnecessary costs, speculation, or permanent losses. If you're ready to start investing, some of those lessons become especially relevant when the money needs to support a decades-long retirement.

Buffett generally wants investors to understand what they own, keep costs low, avoid risks that could wipe them out, and give productive assets time to compound. That puts several familiar investments and strategies at odds with his approach.

Here's what you need to know.

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Cryptocurrency

Buffett has been unusually direct about cryptocurrency. In a 2018 CNBC interview, he argued that Bitcoin and similar assets don't produce anything themselves, saying their value instead depends largely on finding someone willing to pay more later.

For a retiree, that speculative element can be dangerous because dramatic price swings may hit at exactly the wrong time, when withdrawals are already coming out of the portfolio.

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Gold and other nonproductive assets

Buffett has made a similar argument about gold. In Berkshire Hathaway's 2011 shareholder letter, he contrasted productive investments such as businesses, farms, and real estate with assets that don't generate cash flow or produce anything.

His concern isn't that gold can never rise in price, but that long-term returns depend heavily on someone else eventually valuing the same asset more highly. Retirement investors who put too much into nonproductive assets could sacrifice the compounding that comes from earnings, dividends, or other cash flows.

Long-term bonds

Bonds may seem like the opposite of speculation, yet Buffett has also warned about relying too heavily on them. In Berkshire's 1986 shareholder letter, he explained that the company was generally wary of long-term bonds because inflation can steadily erode the purchasing power of their fixed payments.

He made the point even more starkly in the 1984 letter, arguing that an all-bond portfolio could face severe real losses if inflation accelerated sharply. For retirees, the lesson is that avoiding stock-market volatility doesn't automatically eliminate risk.

Investing with borrowed money

Few Buffett warnings are stronger than his warnings about leverage. In Berkshire's 2010 shareholder letter, he acknowledged that borrowed money can magnify gains, but warned that it can also turn even a long history of success into financial disaster. During Berkshire's 2020 annual meeting, he was even more explicit, saying investors shouldn't use borrowed money or margin to buy investments.

For retirees, leverage can be especially unforgiving. A market drop can lead to margin calls or forced selling, potentially locking in losses when you have less time and employment income available to rebuild the portfolio.

Complex derivatives

Buffett famously described derivatives as potentially dangerous, although Berkshire itself has used certain derivatives selectively. His warning focuses on complicated, highly leveraged contracts that can create risks investors, financial institutions, and even counterparties struggle to measure. In Berkshire's 2002 shareholder letter, he warned that long-term derivatives can create enormous, difficult-to-monitor obligations and later described them as "financial weapons of mass destruction."

That doesn't mean every option or derivative is inherently reckless. But retirement investors who buy complicated products they don't fully understand may be taking on leverage, counterparty risk, or potential losses that aren't obvious from the initial investment. Buffett's broader rule still applies: Complexity shouldn't substitute for understanding.

Bottom line

Would you still feel comfortable owning an investment if its price plunged, its fees quietly compounded for 20 years, or borrowed money forced you to sell at the worst possible moment? Buffett's warnings suggest that protecting retirement wealth often has less to do with finding the next great investment and more to do with avoiding risks that can permanently damage your capital.

You don't have to copy Berkshire Hathaway's portfolio to use that lesson. Keeping costs low, favoring investments you understand, diversifying, and avoiding leverage can help you avoid money mistakes while giving your retirement savings more opportunity to compound over time.

This article is for informational purposes only and should not be considered investment advice.

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