Hard to tell what the value of music will be in 5 years
But most of the market, is, of course, lower end. Probably "good enough" machine-produced music is going to dominate casual playlists, but some bands still will have large followings, and live show still be valuable.
Which be exactly why it makes sense to sell
Hard to see a world where the value goes up. Best case it stays stable, worst it decreases