Getting in the game is the easy part, staying in the game is a different story.
Improvements in technology allow you to produce (ex: GarageBand, Pro-tools, Reason) and distribute (ex: Tunecore, social networks) music inexpensively and easily.
The only barrier to entry is creation.
How will you differentiate yourself from the sea of mediocrity?
Do you have the talent, the drive, and the tenacity to stay in the game?