Pray your Rosary, receive the Sacraments, abide in a state of grace. If you do that, no matter what happens in "the world," you will have nothing to worry about. Promote the same to others. That is your mission as a Catholic.
Regarding organ harvesting, it is not hypothetical. The elites already harvest human body parts, involuntarily, for various health treatments, the latest and greatest example being the COVID vaccines. And I will not mention the obvious cases in China.