Lindy Effect
The Lindy effect is the observation that for non-perishable things — technologies, ideas, institutions, books — longevity predicts future durability. Each additional year of survival is evidence that the thing has survived threats that would have killed it, making it more likely to survive future threats of the same kind.
The name comes from a New York deli (Lindy's) where comedians noticed that the longer a comedian had been working, the longer their remaining career was likely to be. Nassim Nicholas Taleb formalized and extended the concept in Antifragile and The Black Swan.
The basic logic
A book published last year has an expected future life of perhaps a year. A book in continuous print for 100 years has an expected future life of 100 more years — because whatever made it survive the 19th century, two world wars, and the internet is probably still present.
The same reasoning applies to technologies, institutions, and monetary systems. Survival is not accidental. It implies the thing has been tested, attacked, and not broken. The longer the test, the stronger the implied resilience.
What Lindy does not mean
Lindy is a claim about durability prediction, not quality prediction. A technology can be inferior on the merits and still be more Lindy (QWERTY vs. better keyboard layouts). The Lindy effect is survivorship reasoning, not endorsement.
It also does not apply to perishable things. Biological organisms, food, or physical materials that degrade over time do not follow this logic.
In crypto: Bitcoin's Lindy advantage
art-of-trading-with-light-su-zhu-and-hasu applies this directly. Su Zhu (~October 2020): Bitcoin was "40% more Lindy than it was in 2017, and 10x more Lindy in terms of years that normies have seen Bitcoin." That duration matters for institutional adoption. A family office manager taking Bitcoin exposure is taking a reputational risk. A 12-year-old network that has survived 80–90% drawdowns, hard forks, regulatory threats, exchange hacks, and repeated "Bitcoin is dead" declarations offers better risk cover than a 3-year-old network still mid-roadmap.
The contrast with Ethereum is sharp in this framing. Each major protocol upgrade — ETH 2.0, sharding, rollup migration — resets Lindy somewhat, because it is a new claim on trust that requires fresh validation rather than drawing on accumulated track record.
Su Zhu: "Bitcoin being around and being kind of similar and predictable is super important for these people because they know what they're going to get and they don't have to worry about Vitalik deciding to skip ETH 2.0 and going to ETH 3.0."
Connection to trust minimization
Trust minimization and the Lindy effect reinforce each other. A system that minimizes trust does so partly by keeping its rules hard to change. Rules that have resisted change for many years accumulate Lindy — participants can observe that the rules survived pressure to change them, which makes the rules more credible for the next period.
Limits
Lindy reasoning can fail when the environment changes faster than the accumulated track record anticipates. An institution that survived 200 years of one political order might not survive 10 years of a structurally different one. The Lindy effect is a heuristic about persistence within a relatively stable threat landscape, not an ironclad guarantee across regime changes.