Jim Cramer says he sold all his Bitcoin a few weeks ago, citing warnings from IBM chief Arvind Krishna that quantum computers could break Bitcoin's cryptography within three to four years. Bitcoin has instead climbed from roughly $64,000 to above $74,000 since his announcement, and cryptography researchers put the real timeline at 20 to 40 years.
Jim Cramer, host of CNBC's Mad Money, says he sold all of his Bitcoin holdings a few weeks ago, and the coin has rallied since he made that call. He points to quantum computing as the threat that pushed him out.
The quantum catalyst
Cramer's decision traces back to a late-July conversation with IBM Chairman and CEO Arvind Krishna, held around July 30-31. Krishna suggested commercial quantum systems could compromise Bitcoin's cryptographic foundations within three to four years. That warning apparently landed hard, and by early August Cramer was publicly declaring his intent to liquidate his Bitcoin position entirely.
There is no verifiable evidence he actually did. No on-chain transactions, no public filings back the claim — he said he sold, and the blockchain keeps its own ledger. Experts are split on timing too: while Krishna floated three to four years, most cryptography researchers put the meaningful threat timeline at 20 to 40 years out.
Bitcoin rallies anyway
In the weeks following Cramer's early-August announcement, Bitcoin climbed from roughly $64,000 to above $74,000 by August 21, a gain of more than 15% in about three weeks. Traders call this pattern the "Inverse Cramer" — whatever he says to do, the market does the opposite — a phenomenon well-known enough that an Inverse Cramer ETF was filed for, and later withdrawn, in 2023.
Cramer's Bitcoin stance has shifted before. He was a skeptic in December 2022, when Bitcoin traded near $16,800 in the aftermath of the FTX collapse, then called it a technological marvel by January 2024. The reversal continued this month: on August 20, he advised a caller to buy Bitcoin directly rather than through crypto-related equities, the same month he announced selling all of his own holdings.
Is the threat real?
The National Institute of Standards and Technology has worked on post-quantum cryptographic standards for years, evidence the risk is taken seriously at institutional levels. But today's most advanced quantum computers run on a few thousand qubits, while breaking Bitcoin's encryption would likely require millions of stable, error-corrected qubits — an engineering gap that remains enormous.
Krishna's three-to-four-year estimate sits at the aggressive end of expert opinion; most researchers in the field lean toward decades rather than years before quantum machines threaten production cryptographic systems. Bitcoin's climb since Cramer's exit suggests the market's current sentiment has already rendered its verdict on the quantum scare.
Source: Crypto Briefing
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