Today is Hal Finney's birthday – a person without whom Bitcoin would not exist.

Today Hal Finney would have turned 68, a man who played a crucial role in the history of Bitcoin.

Being a well-known cryptographer even before the emergence of Bitcoin, Finney joined the cypherpunk movement and supported the cryptocurrency in its early stages.

Not only did he receive the first Bitcoin transaction from Satoshi Nakamoto, but he is also, according to one theory, potentially the creator of Bitcoin himself.