A mysterious individual (or a group, who have created Bitcoin,opening up a whole new era in the history of technology. )
His claimed birthday date contains few significant dates at ones: 5th of April 1975
On 5th April 1933 a US president at the time, Franklin D.Roosevelt issued an executive order 6102, which explicitly called all American citizen to surrender their gold in exchange of banknotes under the threat of prison and a hefty $10000 fine.
http://www.presidency.ucsb.edu/ws/index.php?pid=14611
On 21st of April 1975, Public Law 93–373 came into effect allowing American citizens, once again, own, store and trade gold.
Thus, the claimed date of birth of Satoshi Nakomoto encompass both government oppression and birth of the New Gold.