Why can't kinetic energy be greater than potential energy?

Kinetic energy cannot be greater than potential energy because potential energy is the maximum amount of energy that an object can have at a given position, while kinetic energy is the energy of motion. When an object is at rest, its potential energy is at its maximum, and as it starts moving, its potential energy decreases while its kinetic energy increases. Therefore, the total energy of the object remains constant, with potential and kinetic energy balancing each other out.