On 12 January 2009, Satoshi Nakamoto, the creator of Bitcoin, sent 10 BTC to cryptographer Hal Finney, marking the first transaction in blockchain history. Since Finney didn’t pay for the transfer, some argue it doesn’t count as a ‘trade’.The New Liberty Standard Exchange recorded the first exchange of Bitcoin for USD in late 2009, when 5,050 bitcoins sold for $5.02 via PayPal. The purchase price per Bitcoin was approximately one-tenth of one cent. The parties negotiated the deal in an online forum.The first known instance of exchanging Bitcoin for physical goods or services occurred on 22 May 2010 when a pizzeria in Florida accepted 10,000 BTC as payment for two pizzas. Some cryptocurrency enthusiasts celebrate 22 May as Bitcoin Pizza Day to commemorate the occasion.