Uncommon
The first sat of a block: the lowest rarity tier above common in ordinal theory, one per block bar the few whose first sat ranks higher.
How a sat qualifies
Ordinal theory numbers every sat in the order it was mined. Each block's subsidy creates a run of new sats; the first sat of that run is uncommon. In the fork's terms, a sat s in block h is uncommon when s is the first sat of h's subsidy (its offset in the block is 0).
Rarity tiers are exclusive here: a first sat that is also the first of a difficulty adjustment period is rare, of a halving epoch epic, and so on. Those are not counted as uncommon. That is why the total below is a little less than the number of blocks that will ever pay a subsidy.
Why collectors care
Uncommon is the entry point of the rarity ladder: one per block (bar the few blocks whose first sat ranks higher), so the supply grows with every block and is fixed in advance. The sat just before each one is the previous block's last sat, a black sat. Uncommons that also carry another type, such as alpha uncommons or the milestone uncommons, are collected as their own categories.
How many
6,926,535 uncommon sats will ever exist; 971,941 have been mined so far, and 250,736 sit alone in small outputs, extracted by a collector.
Supply and market
| Category | Will exist | Mined | Extracted | Last sale | Floor |
|---|---|---|---|---|---|
| Uncommon | 6,926,535 | 971,941 | 250,736 | 20,000 sats | 14,999 sats |
As of block 972,427. Prices are per sat.