1. Margin calls,
2. clearing houses ensure no counter party risk.
3. Contract standardization and risk exposure netting.
So a clearing house faces both the buyer and seller and guarantees contract performance of both parties.
Since no coins are delivered e.g. cash settled, the will not affect the fair market price directly.
4. You will hate this, but facts are facts… at a clearing house that is deemed systemically important by the cftc RISK is socialized.