Obama didn’t control the Fed.
The Fed would act to prevent collapse. That’s what the Fed does. So Obamacare could not just die on its own. The increase rates are in the legislation already tied to the CPI-Medical. The bonds are issued on autopilot. If there are no buyers, the conservative hope, the Fed just buys them.
There is no path to victory doing nothing.
The Fed would not act unless the Pres. ordered it. That’s not its job. It regulates the banks and the money supply, not the healthcare industry. And I don’t know how the Pres. could order it if Congress did not authorize it.
Particularly if Trump is the Pres. Trump would have no desire to print money to bail out Obamacare.