Astrophysicist who raised early concerns about Bitcoin
On January 17, 2009, eight days after Bitcoin v0.1 was released, an Indiana University astrophysicist named Jonathan Thornburg posted to the cryptography mailing list two predictions that would echo through Bitcoin’s history:
“In the modern world, no major government wants to allow untracable international financial transactions above some fairly modest size thresholds.”
“But if each machine in a million-node botnet sends 10 cents to a randomly chosen machine in another botnet on the other side of the world, you’ve just moved $100K, in a way that seems very hard to trace.”
Both have substantially materialised in the years since — extensive cryptocurrency regulation, widespread mining malware. Satoshi Nakamoto responded directly on the mailing list.
On January 17, 2009, Thornburg posted a detailed response to Satoshi’s email about Bitcoin’s potential uses. He raised two fundamental concerns that would echo through Bitcoin’s history:
First, government regulation: “In the modern world, no major government wants to allow untracable international financial transactions above some fairly modest size thresholds.” He cited the standard regulatory arguments — money laundering, tax evasion, and terrorism financing.
Second, botnet exploitation: “But if each machine in a million-node botnet sends 10 cents to a randomly chosen machine in another botnet on the other side of the world, you’ve just moved $100K, in a way that seems very hard to trace.” He concluded that “no major government is likely to allow Bitcoin in its present form to operate on a large scale.”
He also raised concerns about botnets burning through pay-per-send email filters and botnet operators profiting from Bitcoin mining.
Thornburg got the pressures right and the conclusion wrong. The regulation and the botnet abuse he warned of both arrived — but his bottom line, that “no major government is likely to allow Bitcoin in its present form to operate on a large scale,” did not. Bitcoin grew into the large-scale system he doubted governments would tolerate, regulation and all.
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Astrophysicist Jonathan Thornburg raises concerns: no major government allows untraceable international transfers, and a million-node botnet could move $100K at 10¢ each.