My son started music college last year ( he is a guitarist ) in his year there were 4 drummers, 7 guitarist, 3 singers, 3 dj's no bassist and no keyboardist. He got himself a bass and amp, I gave him some lessons, and through the whole year he was very much in demand, playing in 3 bands. When he goes back next year as there are 2 bassist starting he is going to go back and play guitar and also bass as he really enjoys it. He practices in his room, one night guitar, next night bass. So as has been stated in this thread by others, if you enjoy both, play both.