CNBC's Jim Cramer says he plans to sell all his bitcoin, arguing that quantum computing could break the cryptocurrency's security within about three years. The claim followed a July 30 interview with IBM Chairman and CEO Arvind Krishna and revived the market's long-running "inverse Cramer" trade. Bitcoin itself kept trading near $63,764 on August 3, 2026, largely unmoved by the remarks.
Jim Cramer says he will sell all his bitcoin, tying the decision to how fast quantum computing is advancing. The CNBC "Mad Money" host made the comments after a July 30 interview with IBM Chairman and CEO Arvind Krishna, who raised concerns in that interview about the technology's threat to modern cryptography.
Cramer Ties Quantum Progress to Bitcoin's Security
According to that July 30 interview, Krishna warned that investors should be "paranoid" about quantum computing's ability to challenge modern cryptography within three to four years, citing IBM's advances toward commercially useful quantum machines. Cramer said he intended to exit his bitcoin position entirely, arguing the technology could threaten the Bitcoin network on that same timeline.
Market Shrugs While Inverse Cramer Trade Returns
Traders have spent years treating Cramer's calls as contrarian signals, and this one was no exception: crypto users flooded social media celebrating his planned bitcoin exit instead of reacting with alarm. No one has independently confirmed how much bitcoin Cramer owns or whether he has sold any of it.
Bitcoin itself barely reacted. The price stood near $63,764, a modest gain. Strategy, the company formerly known as MicroStrategy, disclosed a sale of about 1,638 BTC earlier the same morning.
Where the Real Quantum Risk Lies
Cramer's concern centers on the math protecting bitcoin ownership. Every address relies on a signature system called ECDSA, part of the cryptography underpinning the network; a sufficiently powerful quantum computer running Shor's algorithm could theoretically derive a private key from a public key. In practice, that risk concentrates in addresses that have already revealed their public keys, through reuse, older wallet formats, or the brief window between a broadcast and a confirmed transaction.
A March 2026 paper from Google Quantum AI estimated that breaking this cryptography could take fewer than 500,000 physical qubits, roughly 20 times fewer than earlier projections. Today's quantum systems still run in the hundreds to low thousands of physical qubits, with only a handful of the more reliable logical qubits an attack would need. Researchers estimate roughly 30% of bitcoin's supply, about 6 million to 7 million BTC, sits in exposed addresses, much of it in early wallets that have sat untouched for years.
Experts Split on the Timeline
Krishna has pointed to 2028 and 2029 for measurable commercial impact at IBM, with broader economic effects arriving later. Many conservative researchers, however, place a cryptographically relevant machine in the 2030s or even the 2040s. Cramer has reversed his bitcoin stance before, selling during the 2021-2022 downturn and later calling it a hedge, before this latest reversal.
His three-year prediction still sits well ahead of where most technical experts expect the real threat to arrive.
Source: Bitcoin News
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