MAY 13
Metcalfe’s Law
One More Person. Many More Possibilities.
The Signal
A network’s possibilities can grow much faster than its membership.
The Reading
Put two people in a room. There is one possible pair. Add two more people. Now there are six possible pairs. You doubled the people, but created six times as many possible connections. That simple idea sits behind Metcalfe’s Law. Robert Metcalfe helped invent Ethernet in 1973, allowing computers to communicate. Later, he proposed that a network’s value could grow roughly with the square of its users. Double the users, and his model suggests about four times the value.
It sounds technical. But think about joining a marketplace. You arrive as one person, yet you could trade with everyone already there. Each newcomer brings many possible relationships, rather than just one.
Researchers tested the idea using Facebook and Tencent. Their historical data fitted the relationship well. Bitcoin researchers have also found strong links between measures of participation and the network’s total market value. That matters. It suggests there is an economic foundation beneath the excitement: people connecting, exchanging and finding reasons to use the same money.
Bitcoin is harder to measure than a social platform. One person can have many addresses, while an exchange can hold bitcoin for many people. Studies therefore use estimates, and disagree about the exact formula. The useful insight survives. A growing network can create opportunities faster than a simple headcount suggests. For someone thinking years ahead, that changes what deserves attention. Alongside the price, look for useful participation: people receiving payments, businesses serving customers and tools making exchange easier. The hopeful part is that each useful arrival can expand what becomes possible for others. You are looking at relationships being built, not merely names being added.
First Principles
New participants can create many possible connections.
Research supports a relationship between participation and Bitcoin’s historical value.
Useful connections give network growth economic meaning.
Today’s Challenge
Place two mugs on your table. Touch each possible pair: one.
Add two mugs. Touch every possible pair once: six.
Your mugs doubled. Your possible connections multiplied sixfold. These are possible relationships, not six guaranteed trades.
Imagine each mug is someone able to trade with the others. That is the possibility hidden inside a growing network.
Tomorrow’s Signal
Why Networks Compound