Headline supply is a warehouse, not the float

We keep running into the same mismatch when we read supply talk on here. Someone quotes a big round number for coins outstanding and treats it like depth. It is not depth. It is a stock of outputs, most of which are not offered.

A UTXO is just a discrete chunk of bitcoin that has not been spent yet. The set can grow because people split change, or shrink when they consolidate. Neither move, by itself, tells you how much bitcoin would trade if the tape got hit. Liquidity is the marginal slice: coins whose owners are willing to sell into the book, or whose bids are actually resting there. Aged outputs that have not moved in years are inventory. Dust that costs more in fees to spend than it is worth is closer to clutter than to float.

Fees are the quiet part of that story. Miners do not get paid to make the UTXO set tidy. They get paid to include transactions. When fees are low, consolidation is cheap and some of that clutter can be swept back into spendable outputs. When fees are high, small outputs stay stuck, and the coins that clear are the ones attached to owners who care enough to pay. The incentive is local and unsentimental. It does not line up with a clean circulating supply figure.

We are not claiming we can see who will sell. Coin age and output size are clues about constraints, not a forecast. Cycle narratives like to pretend the float is a dial someone turns. In practice the dial is whoever shows up with a spendable output and a price they will take, against whoever is bidding. That gap is why a quiet order book and a huge headline supply can sit next to each other without contradicting.

If you are marking risk off the full stock of coins, you are marking a warehouse, not the aisle that is open today. How do you separate coins that have not moved from coins that will not move when fees spike? We still do not have a clean answer. NFA.