The number of unique Bitcoin addresses with a non-zero balance crosses the 10,000 mark, a milestone that demonstrated growing adoption of the then-obscure digital currency. Just two years after Satoshi mined the genesis block, Bitcoin had grown from a single node to a global network of thousands of participants. While 10,000 addresses does not equal 10,000 users (one person can hold many addresses), it represented a meaningful threshold in the network's growth. By 2025, the number of non-zero addresses would surpass 50 million.
BitInfoCharts: Bitcoin Address Statistics