Perhaps, for some, the figure of $ 1.5 million will seem small, but let's not forget that these coins have been on the hodling for more than 10 years. In 2010, 50 BTC was worth almost nothing, because until July 17, 2010, bitcoin failed to reach the mark of five cents.
The Blockchair privacy tool showed that the transfer received a 5 out of 100 privacy score, i.e. "low". Problems with anonymity are that the recipient's address was involved in several transactions.
Similar transactions took place on June 26, when there were two transfers for a total of 100 bitcoins. Moreover, both block rewards were received on the same day, July 12, 2010, which suggests that they were transferred by the same user.
In 2023, there were a total of nine transfers of rewards for 2010 blocks, but only eight of them were associated with dormant wallets for 13 years.