In our everyday life: most of the element behavior like either particle (or group of particles)  or wave.
And we tend to interpret all the system in term of particle or wave.

For visible light or energy less than visible light, we will find it's wave properties easily.

However, for very high energy gamma ray (especially paused gamma ray). we will find it behavior more like particle.

If an experiment was designed to measure wave property: we will find it's wave property.
If an experiment was designed to measure particle property: we will find it's particle property.
So it depend how you look at it (measure it).