Something just came to my mind that I haven't reflected on in a long time: What was actually the last sign of life from Satoshi Nakamoto? It’s been over 15 years now, but the story behind it is still fascinating.

On December 12, 2010 – Bitcoin was then trading at just $0.50 – Satoshi Nakamoto posted for the last time on the Bitcointalk forum. And here’s the interesting part: it wasn’t a dramatic farewell, nor a philosophical treatise about the future. No, it was pure technical discussion. The message addressed security concerns regarding potential DoS attacks on the network and referred to Bitcoin Core version 0.3.19, which included relevant improvements.

That says a lot about the man, doesn’t it? Until the very end, focused on technical issues, not hype or personal thoughts.

But what fascinates me even more: he didn’t announce his withdrawal at all. He simply stopped writing. No goodbye, no explanation. Some speculate that this was intentional – to preserve decentralization and prevent Bitcoin from being tied too closely to a single person. Other theories point to personal reasons or even suggest that Satoshi might not have been a single individual at all.

For context: at that time, Bitcoin was just starting to become commercially interesting. The famous pizza deal – 10,000 BTC for two pizzas – was only a few months back, in May 2010. The network was still young, fragile, and Satoshi Nakamoto was still actively involved in securing it.

Then he was gone. And to this day, we don’t really know why. Sometimes I wonder if he knew what Bitcoin would become.