The man who helped build Bitcoin is now questioning whether its mysterious creator still controls a single coin. Adam Back, one of cryptography's most respected minds, dropped a bombshell at Blockchain Paris Week, suggesting Satoshi Nakamoto's legendary fortune may have vanished — not by choice, but by human error.
Back pointed to a brutal flaw in Bitcoin's earliest infrastructure. In those primitive days, users manually saved a file called wallet.dat to preserve their private keys. Worse, every new transaction demanded a fresh backup. Miss that step, and your coins were gone forever. Back bluntly acknowledged, "This could have happened. After all, he is human."
The stakes are staggering. Early network participants mined roughly 2.5 million BTC in Bitcoin's first year alone. Satoshi's estimated share sits somewhere between 500,000 and 1 million BTC — a fortune worth billions today.
Yet nobody actually knows. Mining pattern analysis forms the entire basis of these estimates, and Back made clear — they remain pure speculation.