Some blocks matter beyond the coins they moved. The genesis block carries a newspaper headline that doubles as a timestamp and a statement of purpose. Activation blocks for SegWit and Taproot mark the end of long, bitter arguments about what Bitcoin should be. And block 666,666 attracted messages for no better reason than the number.

In each case people wrote themselves into the moment, knowing the block would be remembered. The SegWit activation block carries congratulations from companies and individuals who had spent years on opposite sides of the debate. Taproot's carries the plain delight of people glad to have seen it happen.