Is my understanding correct:

A perpetual contract is a contract that never settles currency

It's like the exchange has opened a betting platform

Some bet on the rise

Some bet on the fall

It never settles real cryptocurrency

If someone gets liquidated in between, the money is given to the party that bet correctly

The exchange collects a commission, making a guaranteed profit

The two parties in the transaction are in a zero-sum game, or even a negative-sum game

Experts who know, please give some guidance