Well, you'll play music for the rest of your life if you love it, but to extract money for what you do takes a real focused approach. The big money in commercial music is and always has been the songwriting residuals - Mick & Keith and Robert & Jimmy are famous for being the the Stones and Led Zeppelin, but they're RICH because they got a few fractions of a penny each and every time their music got played on the radio, all those classic rock stations, all those years... nowadays young writers look for immediate commercial, movie, video-game tie-ins. I tell my students that the best career (I wish I'd chased) is in writing for films and TV - there's millions of hours of vid being shot in Hollywood, every year - but it's an increasingly crowded field.
Of the two best guitarists I knew & played with growing up, one of them owns a studio in Minneapolis and the other is a professor at Berklee School of Music in Boston. They both still play out with their bands, but they just didn't want the touring thing - the odds against massive success are way against you. Leo Whitebird in Mpls. has played on tons of projects he's produced, and Julien Kasper in Boston has a couple of great CD's out, but for long term planning it's good to have at least one other way to extract money from the world, whether it's as an adjunct to music or as a $50-an-hour plumber.