Satoshi Nakamoto is the anonymous entity that is responsible for the creation the Bitcoin network & currency in late 2008. Outraged by the opaque and flawed state of global finance, this entity set out to create an alternative digital monetary ecosystem; a fair, transparent, immutable, censorship resistant, boarder-less alternative.
The identity of the entity remains a mystery given that not long after the launch of Bitcoin, Satoshi understood that he must disappear from the public, otherwise the system would never have been as socially resilient as it is today.
It goes to say that before it Disappeared it (Satoshi) accumulated a whopping 1,000,000 (1M) Bitcoins [~4.761% of the total supply] in his personal wallet.