A mercury-to-gold claim enters the bitcoin-vs-gold scarcity debate

On The Decrypt Daily: Crypto Spooked on Oil and Cyber Hacks, Gold is Mineable & Pump Adds to Its Stack, published 22 October 2026, the host argued that a fusion company's claim to have turned mercury into gold sharpens the contrast between bitcoin's 21 million token cap and gold's uncapped supply. The next day, on Bankless: ROLLUP: Black October | Uptober Lasted 4 Hours | JPMorgan's Bitcoin Forecast | Gold Alchemy, published 23 October 2026, the hosts relayed a stronger version of the same argument, attributing it to the investor Nic Carter. The argument rests on a company announcement that, so far, comes without published data.

The argument

On The Decrypt Daily, the host said Marathon Fusion "has demonstrated alchemy" (from 12:16), then drew out the comparison: "Bitcoin's capped, folks. Twenty one million tokens. Gold is uncapped. We've known it was uncapped for a while, but now we've got an active team in San Francisco trying to mint it." (from 12:35)

On Bankless, the hosts read Marathon Fusion's own description of its progress aloud: "we've reduced alchemy to a series of difficult but tractable engineering problems. With AI, engineering problems are now simple." (from 48:25) They then relayed Nic Carter's reaction: "this is gold's quantum FUD, but it's way worse because you can't software update gold" (from 44:34). The point, as one host had put it at the top of the show, is that "Bitcoin can software update. You can't software update gold." (from 1:19). The hosts were also careful about scale: one called the output "a trace amount" (from 44:26), and another said the scenario "hasn't been done yet" and is "maybe still many years away" (from 1:44 and 1:52).

What it rests on

Marathon Fusion's claim has two layers, from two different years, resting on two different kinds of evidence. In a paper published in mid-July 2025, covered by Kitco, the company proposed, through modeling rather than an experiment, a process for irradiating the mercury-198 isotope with neutrons a fusion reactor already produces, yielding mercury-197 that decays into stable gold-197. The company said the process could generate about 5,000 kilograms of gold per gigawatt of electricity generation each year, worth over $500 million, without reducing a plant's power output, calling the method "massively scalable, pragmatically achievable, and economically irresistible." Kitco reported the paper had not been peer-reviewed, and its supportive quote came from Princeton Plasma Physics Laboratory researcher Ahmed Diallo, who is also a scientific advisor to Marathon Fusion.

The claim the hosts were reacting to is newer and thinner. On 21 October 2026, Marathon Fusion posted on X that it had moved beyond the 2025 proposal, "beating CERN's record by a factor of 10." But the thread disclosed no gold mass produced, no isotope purity, no recovery efficiency, and no cost, and the claim has not been independently verified. The CERN comparison is to the ALICE experiment's detection of lead nuclei converting to gold during particle collisions, which produced about 29 picograms of gold over four years of LHC running; ten times that rate, one outlet wrote, is still "a laboratory curiosity, not a commercial quantity." The fusion reactor Marathon Fusion is now building in San Francisco targets 1 kilowatt of power, a small fraction of the gigawatt scale its gold economics assume. By comparison, mines produced about 3,670 tonnes of gold worldwide in 2025.

Not every Marathon Fusion claim rests on the same footing. The company's separate lithium-isotope enrichment result, from the same October announcement, carries outside laboratory certification, giving it firmer support than the gold claim the hosts built their argument on.

Where it was discussed

• The Decrypt Daily: Crypto Spooked on Oil and Cyber Hacks, Gold is Mineable & Pump Adds to Its Stack, 22 October 2026, from 12:16
• Bankless: ROLLUP: Black October | Uptober Lasted 4 Hours | JPMorgan's Bitcoin Forecast | Gold Alchemy, 23 October 2026, from 44:34