I recently came across a very interesting article that revisited the story of Satoshi Nakamoto, the founder of Bitcoin, sending his final letter fifteen years ago. On April 26, 2011, this legendary figure told the development team that he was shifting his focus to other matters and handed over the network's alert key. As I read this, I wondered: how can one person's departure have such a profound impact on the entire ecosystem?

Pete Rizzo's research report took six months to complete, including over 120 citations, deeply exploring Satoshi Nakamoto's story during Bitcoin's early development period. What impressed me most was that he discovered Satoshi was not engaged in some "financial innovation" from the very beginning, but had a very clear goal — to create a currency system that is not controlled by any central party or government.

Looking back at Satoshi's comments on forums from back then, you can feel how disappointed he was with the traditional financial system. He wrote that the fundamental problem with traditional money is the need to trust central banks, but the history of central banks is full of breaches of trust. Banks are the same; they lend out far more than their reserves, and this model is inherently flawed. Therefore, the emergence of Bitcoin was actually a complete rejection of the entire system.

Interestingly, before Satoshi "disappeared," he was still active behind the scenes. Through email records provided by Gavin Andresen, we can see that he had several disagreements with other developers, especially regarding how to handle the project's reputation and attention. But the most critical discovery is that by the time Satoshi left, Bitcoin no longer needed an omnipotent leader — this shows his decision was well thought out.

In 2010, there was a serious protocol vulnerability where someone created billions of bitcoins out of thin air. This was a huge blow to Satoshi, and afterward, he became more cautious, starting to make more frequent unannounced updates, all focused on preventing deadly attacks from happening again. You can sense his almost obsessive security awareness.

Another detail that illustrates the issue well is this: before leaving, Satoshi personally removed his name from the copyright statement of the Bitcoin software and handed the code over to "all Bitcoin developers." This was not an impulsive decision but a planned, formal exit. It also explains why even today, no one truly knows who Satoshi Nakamoto is — he intended to remain hidden within the system from the start.

The community's attitude toward Satoshi also evolved. In early 2010, it was still a honeymoon period, and everyone was excited. But over time, users began questioning his decisions and even mocking him. By the end of 2010, some in the community openly criticized him for failing to meet various needs. Perhaps this was one of the reasons he ultimately chose to leave.

Looking back, Satoshi left behind not just a codebase but a philosophy. He deeply understood that Bitcoin was solving a scientific problem like the Byzantine Generals' Problem, and he had the ability to turn theory into reality. Even after 15 years, his influence continues to shape the entire crypto ecosystem. To some extent, his departure has made Bitcoin even stronger — because it no longer relies on any individual.