Pull the keystone and the arch falls.

Every coin launched here is a stone. When the same wallets hold two coins, all week long, those two coins are bound together; the more they share, the stronger the joint.

On Sunday at 20:00 UTC, the coin whose joints carry the most weight becomes the keystone. Its dev burns the next tranche of their own bag, a burn they signed before the coin existed. Nobody votes and nothing is decided by hand.

A coin can hold the top four times, once per tranche. A week with a missing snapshot has no keystone, and the chronicle says so.