According to BlockBeats, on September 21, Arkham monitored that $15.95 million worth of Bitcoin (250 BTC) had just been transferred from five addresses that were active in the first month of Bitcoin's existence (January 2009).

Each address received 50 BTC for mining one of the 2247, 2401, 2455, 2486, and 2690 blocks. The Bitcoins at these addresses have been dormant for nearly 16 years.