A solo Bitcoin miner has successfully mined block number 858,978, earning a reward of approximately $199,098. This achievement comes amid growing concerns about centralization in the Bitcoin mining industry. The miner managed to secure the block with a relatively modest hash power of 40 PH/s. Meanwhile, Bitcoin's market has experienced significant volatility, with the cryptocurrency's price dropping back to $59,000 after failing to maintain gains above $60,000. This recent volatility marks the highest level of realized volatility in over a year.