Napster

In 1999, a teenager’s program let 80 million people share music directly with one another. Napster showed the world the power of peer-to-peer — and then, just as vividly, it demonstrated the fatal weakness that peer-to-peer money would have to avoid.

The peer-to-peer breakthrough

Before Napster, getting a file meant downloading it from a company’s server. Napster flipped this: the files lived on ordinary users’ computers, and people downloaded directly from each other — “peers”. Suddenly a network could be enormous without anyone building enormous data centres. The users WERE the infrastructure.

But there was still a middle

Napster’s files were decentralized, but its directory was not. To find who had a song, your computer asked Napster’s central servers — one company-run index of everything available. That index was the heart of the system… and its single point of failure.

Why this is a money lesson

This is the same weakness that killed DigiCash and e-gold, and the same one that lets banks freeze accounts. A network is only as unstoppable as its most central part. Napster proved millions of strangers could cooperate at scale — but also that a central coordinator is a target you can’t defend forever.

So the obvious next question was: could you keep the peer-to-peer power but remove the central index entirely — so there’s nothing to sue, seize, or switch off? The answer arrived almost immediately, in the technology that replaced Napster: BitTorrent.