Key vibration patent

You can't patent an idea, you must turn it into a realistic technology, object, etc.

You can find someone to cooperate and see if you can make a prototype, and then apply for a patent together.

Why can't I apply? For example, I want to build a spaceship (using electricity and nuclear energy) to fly among the stars. If I can apply for a patent, no matter who invented it in the future, I have to give you money. It's no use thinking about it.