"Rail travel at high speed is not possible because passengers would suffocate." (Dr. Dionysius Lardner, 1830s)

"This 'telephone' has too many shortcomings to be seriously considered as a means of communication." (William Orton, 1876)

"Heavier-than-air flying machines are impossible." (Lord Kelvin, 1895)

"The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular?" — David Sarnoff’s associates, 1920s, rejecting radio’s potential

"There is no reason anyone would want a computer in their home." — Ken Olsen, DEC founder, 1977

"I predict the Internet will soon go spectacularly supernova and in 1996 catastrophically collapse." (Robert Metcalfe, 1995)

"Bitcoin has no intrinsic value and will go to zero within 10 years." (Eugene F. Fama, 2018)

"Quantum computers cracking ECDSA? Not in this century." (Schneier, February 9, 2022).