Photons are pure kinetic energy.
Moreover, you could say the energy of a photon is purely kinetic energy.
Do photons have kinetic energy?
But photons are massless. Electrons on the other hand, do have rest mass. It is very confusing when somebody learns about rest mass and thinks electrons can actually be brought to rest. In reality they cannot be. No one has ever experimentally seen an actual electron at rest.
Due to the HUP, when you try to restrict the electron to a very small region of space, the electron's position will be known with high certainty, thus, the electron's momentum (kinetic energy) will have extreme uncertainty (will rise). And vica versa. If you try to restrict the momentum of the electron (cooling), the electron's position will be known with extreme uncertainty.
the uncertainty principle states that the more precisely the position of some particle is determined, the less precisely its momentum can be predicted from initial conditions, and vice versa.
But I do understand where your question might come from. You can read phrases about electrons being standing (evanescent waves) as they exist around the nucleus.
The electrons do not orbit the nucleus in the manner of a planet orbiting the sun, but instead exist as standing waves.
But this is very confusing because in reality electrons are quantum objects and cannot be brought to rest as per the HUP. This is QM.