On passing the hat.
Every culture has a name for it.
The hat goes round. Not the same hat. Every culture brings its own object. In Yorubaland it's esusu. In northern Nigeria, adashe. In England, the whip-round at the pub. In Hindi, chanda. In Vietnamese, chơi hụi. In Japan, tanomoshi-kō. The mechanic is the same everywhere: a group of people pool small amounts toward a shared purpose, and someone takes responsibility for moving the money to where it needs to go.
It's the oldest financial instrument in the world. It predates banks. It predates currency, in the strict sense. Early whip-rounds happened in grain, in livestock, in promises. The instrument is older than the things it moves.
What makes it durable is not the money. It's the trust. You contribute because you trust the organizer to do what they said they'd do. You contribute because you trust the group to chip in too, that you're not the only one. You contribute because the social fabric of the group is the real collateral.
Modern banking apps are bad at this. They're built around the individual account, not the group act. To run a whip-round on a normal banking app, you have to be the bank. Accept everyone's transfers into your personal account, track who paid in a spreadsheet, hope you don't accidentally spend the money on yourself, and then either pay out to a third party (with all the awkwardness of did you actually buy the gift?) or distribute back to everyone, which is even worse.
Hatpass is a tool for the group act. The hat has a name. The hat has a target. The hat has its own bank account, briefly, just for this purpose. Every contributor sees the same page. Every contributor sees the running total. Every contributor sees the deadline. The organizer holds nothing. The money sits in the hat, not in their account, until they choose to cash out, and even then they can choose to send it directly to the vendor instead of touching it themselves.
We didn't invent the whip-round. Every village did, independently, over and over. We just built the digital version of an instrument that has worked for two thousand years, and removed the friction that the analog version always carried.
The hat goes round. We're just passing it.