I’m afraid your understanding of derivatives is somewhat lacking. You need to understand the difference between notional value and value at risk, and how the hedging and the financial strength of the counterparties limit value at risk. The derivatives they have now are pretty safe, they’re much more likely to lose their shirt on something else.
Global Derivatives: $1.5 Quadrillion Time Bomb
$1.5 Quadrillion Derivatives Bomb And The Great Financial Disaster
"Losses Will Be Devastating," Triggering A Derivatives Blowup And Worldwide Collapse