Matter is always in motion
From observation, matter is always in motion and we only detect the net effect of the motion of the observed object on the detector:
a) You detect a particle (e.g. electron) at position P1, then you detect it again and it has moved to P2.
b) So particles are constantly in motion.
c) They don't just move when detected, they constantly interact with other particles, and could never determine what constitutes detection and what doesn't. That would be impossible so they really are moving. All the time.
d) To be stationary the particle must return to the same place / have no net overall movement.
e) So the electon is performing some complex oscillation that ultimately goes nowhere.
f) And this is true for all particles, protons also move when detected, neutrons apparent detected location changes.
g) Consider a particle E1 doing a simple oscillation along a horizontal axis. This is a wave with a polarization.
h) Consider an observer 'OB1 electron' with an oscillation along a vertical axis.
i) The net 'particle' detected by that OB1's observation of E1 is a spin around a plane.
j) So properties like 'spin' are not independent of properties like 'polarization'. They are interrelated effects of an observed particle relative to an observer.
k) Likewise you create an observer OB2 with relative oscillation to E1 such that E1 moves (translates) relative to OB2.
l) Thus linear motion, aka the velocity/momentum property, of E1 relative to particle OB2 is the same form of motion.
m) So velocity is the same motion. Momentum is the same energy.
n) Heat likewise is motion of one relative to another, also the same motion, just a more complex oscillation pattern.
o) YOU NEVER OBSERVE A PARTICLE, you observe the net effect between the observed particle and the observer particle.
p) Backward time effects seen in the cloud chamber are no more than rolling-shutter or strobe effects. The particle is not going backwards in time, the net observation is.