I'm also curious. Is it true for position/momentum/energy/spin/... of any particle? AFAIK energy levels of electrons orbiting around a proton are discrete quan

I'm also curious. Is it true for position/momentum/energy/spin/... of any particle? AFAIK energy levels of electrons orbiting around a proton are discrete quanta but are all other things above also discrete, or can some be continuous? What about the hidden quantum state of things?