I understand you have no need for this app, but please do not belittle the activities of merchants and entrepreneurs who need such instruments to run their businesses.

There are and will be companies that work at the friction point between fiat and Bitcoin. They need to plan cash flows in both currencies in advance and using derivatives is one way to eliminate market risk from your operations (and has been for centuries).

There isn't even a shitcoin token associated with it. To "stabilise" part of your balance (say, set aside a USD sum for a future payment) you simply short one against the other with a p2p contract. https://10101.finance/blog/synthetic-stable/

A market maker can take the other side of a trade and earn a profit by providing a valuable service, if they nerd out the numbers (e.g. a "cash and carry" trade).

With options (which are also derivatives, granted, not yet available in 10101), you can even hedge out volatility itself.

In fact, it is a remarkable feat to make the contracts be resolvable self-custodially. Traditionally, a centralised exchange was needed to settle a trade. But from my understanding, 10101 is just a place for traders to meet with offers while the settlement happens out of band. https://10101.finance/blog/trade-settlement