Exactly 15 years have passed since Satoshi Nakamoto stepped away from the public eye. His final message was posted on December 12, 2010, a simple but telling note: "There's more work to do on DoS." That was it. No farewell, no grand announcement. Just those few words, and then silence—a silence that has lasted over a decade and a half. It's one of crypto's most intriguing mysteries: why did the architect of Bitcoin vanish at that precise moment? Some say the work wasn't finished. Others wonder if Nakamoto simply chose to let the network stand on its own, believing the mission had moved beyond any single individual. Either way, that December day marked the end of an era and the beginning of something entirely new—a financial system with no founder, no face, no central authority to lean on.