Do you play in all keys or are their certain, more common keys that most piano players learn and play in? (G, C, Am, D for example).

I've been teaching myself keyboard by learning the chords for various keys and how to efficiently move between then. Right now I'm memorizing chord patterns for the diatonic chords in the keys of G, Am and Bm. Once I have those down, I'll start learning other keys.

But I'm wondering if I should learn the chords in every single key or if there are a handful of specific keys I need to learn?