The Lindy Effect states that the longer something has survived, the more likely it is to continue surviving. While originally observed in technologies and cultural works (a book that has been in print for fifty years is more likely to remain in print for another fifty than a book published last month), the same logic applies to cryptocurrency networks.
The Lindy Effect measures how long a cryptocurrency has been operating. A blockchain that has operated continuously for over a decade, weathering bear markets, attempted attacks, regulatory pressure, and internal conflicts, has demonstrated a resilience that newer projects cannot yet claim.
This is not about rewarding age for its own sake. Time is a filter, and it is a brutal one. Consider the top 50 cryptocurrencies by market cap at three points in history, and how many of those projects still rank in the top 50 today:
| Snapshot | Survivors Still in Top 50 | Survival Rate |
|---|---|---|
| 12 years ago (2014) | 4 out of 50 | 8% |
| 6 years ago (2020) | ~18 out of 50 | ~35% |
| 3 years ago (2023) | ~27 out of 50 | ~54% |
Stablecoins and exchange tokens excluded.
The decay is steep. Go back just six years, and nearly two-thirds of the top 50 have been replaced. Go back twelve years, and 92% are gone. The projects that vanished were not obscure experiments. They were among the largest and most visible cryptocurrencies of their time: well-funded, widely discussed, and actively traded. Projects that are still running years later have survived real-world stress tests that no amount of theoretical analysis can replicate. Every additional year of operation is another year of proven resilience, and another year that could have exposed a fatal flaw but did not.
TVR uses a simple and objective formula for this metric. The longevity score is calculated by dividing a coin's age in years by Bitcoin's age in years, then multiplying by 100. Bitcoin, as the oldest, always scores 100. Other projects score in proportion to how long they have been running compared to Bitcoin. For example, a coin that has been live for half as long as Bitcoin scores about 50. One that launched a quarter as long ago scores about 25.
A few important details shape how this formula is applied. Age is measured from a project's mainnet launch (the date its blockchain went live and began processing real transactions, not when a whitepaper was published or a testnet was announced). For projects that were created by forking an existing blockchain, the clock starts at the fork date, not the original chain's launch. This is because a fork creates a new network with its own validators, community, and development path; inheriting code is not the same as inheriting survival history.
The simplicity of this metric is intentional. Unlike the other seven metrics, which require qualitative judgment across multiple dimensions, longevity is purely objective. Two analysts examining the same coin will always arrive at the same longevity score.
One property that makes this metric unusual is that every score is always changing. As time passes, newer projects gradually close the gap with older ones simply by continuing to operate. A coin that scores 30 today will score slightly higher next year, assuming both it and Bitcoin are still running. Longevity is earned passively, one day at a time, but it can never be rushed.
The only variable that changes the score is time itself. How much that score matters, however, is a different question entirely. An investor who prizes battle-tested resilience above all else will weight longevity heavily in their analysis. Another who believes a younger project with superior technology can overcome its shorter track record may assign it far less importance. The score is the same for both investors, but the weight they give it reflects their own investment views.
Longevity is the simplest metric in the TVR system, but the evidence behind it is powerful. Historical data shows that the vast majority of top-ranked cryptocurrencies do not survive in the long term. Of the top 50 coins twelve years ago, only 8% still rank in the top 50 today. Time is a filter that no amount of funding, marketing, or community enthusiasm can substitute for.
The scoring formula is straightforward. A coin's age divided by Bitcoin's age, multiplied by 100. Age is counted from the mainnet launch, not from whitepaper publication or testnet activity, and forks count from the fork date. Because Bitcoin's age is always the denominator, every score gradually shifts over time as newer projects slowly close the gap by continuing to operate.
How heavily this metric should factor into an overall assessment is a matter of personal priority. Some investors view a long track record as irreplaceable evidence of resilience. Others see it as less important than technical innovation or real-world adoption. The score itself is the same for everyone. The weight assigned to it is where individual judgment comes in.