Learn to read music AND learn to play using chord symbols!
Most people play the piano by reading music and playing what is on the written sheet music, and that’s fine. Others play by reading only the melody of the song, but also by using the chord symbols that appear above the written music.
Which should you do? I say BOTH. There are benefits to knowing how to do both, so don’t sacrifice one for the other. Why limit yourself to just one way? So keep learning to read music — the better you can read, the better off you will be in many situations. But also learn all you can about music theory and chords, as that will enable you to create a much bigger sound on the piano than you would get from just reading the written sheet music.
For more information on the subject, click on How To Play More Notes Without Reading More Notes.