How it works
In Tallow Cove, Bram kept one big book of who owned what. One book can be smudged or lost, and everyone has to trust one keeper.
Dot's idea: everyone keeps a copy. Each payment is told to everyone, who write it down. When Cy changed only his own notebook, the other four outvoted him.
Digital coins work the same way, as numbers kept in many shared copies. To send coins, you show a secret key that only you hold.
They carry real risks: the value can swing, a lost key can lock coins for good, and a payment cannot be taken back. Nobody promises your coins come back.