They only make up 4% of the world's population but their GDP accounts for nearly 30% of global GDP, the US financial market capitalization is over $50 trillion, which means they dominate nearly 50% of the global financial market...Those are not small numbers and their impact is not small.

Bitcoin will be fine no matter who wins the election but the point is if we have an open government with more bitcoin friendly policies then its development will happen faster and smoother. Meanwhile, if we have a government that is not open and comes up with harsher policies, the development of bitcoin will be slowed down somewhat.
I don't see anyone saying bitcoin will die or not be okay if the US has a president who is not crypto friendly, people are in need of a government that supports it for adoption to happen faster.